How would one connect 3 external monitors to the dell xps 15 9550? I currently have 2 monitors 24' 1920x1200 connected to my monitors. One is the hdmi to hdmi to a monitor, the other is the usb-c to display port on the other monitor. I also have a 3rd cable... usb-c to hdmi as well.
I will most likely buy a 32' 4k monitor and considering using 3 monitors. But I would first plan to use the 32' 4k monitor with one of my 24' 1920x1200 monitors in the meantime. I am also considering a 43' 4k tv as well... deciding whether 32' 4k monitor or 43' 4k TV.
I would need to buy a docking station for this ... correct? Anyone can post a link on dell or amazon of what i would need? Because the dell xps 15 9550, while using the ports on the laptop, you can only connect 2 external monitors right since this old xps has 1 hdmi port and 1 usb-c port? So if you want 3 monitors or more, docking station is what you need to buy and the only way? What if i get another 24' 1920x1200 monitor and thus have three of them... is the docking station still only way?
Also, are the new dell xps laptops or laptops now in generally have more than 1 hdmi port and 1 usb-c port so you could connect 3 monitors? Example a laptop with a usb-c port and say 2 hdmi ports on the laptop? Or is that not possible? So basically a docking station is required if you want 3+ monitors right? But would I need to check if my graphics card for my laptop support 3 monitors?
Also I heard with a docking station, you either can only connect one or at most two external monitors with 4k display... is that correct? If so, why is it? So if someone had say two monitors of 27' 4k and one 32 4k monitor and wanted to connect all 3 external monitors to their laptop, they can't have all of them 4k even with a docking station?
Another thing im confused is this. I read people use docking station for their dual monitor setup. Why would anyone buy a docking station for two external monitor setup... if they could use their hdmi to hdmi cable with one monitor... and a usb-c to display port with their other monitor? Is it because their laptop only have hdmi and no usb-c port and thats why?
@quickguide01 Your topic title says "Multiple Monitor Setup Questions", but your post doesn't ask any questions about multiple monitors. In fact it doesn't ask any questions at all. But if some general info helps, the XPS 15 can run up to 3 simultaneous independent displays, counting the built-in display if it's active. If you disable the built-in display, which can only be done on Windows (not Linux), then you can run 3 external displays. Each display can be up to 4K 60 Hz, but the XPS 15 9550 doesn't have a way to connect 3x 4K 60 Hz displays simultaneously. The closest you can get would be 2x 4K 60 Hz displays and then a 4K 30 Hz or QHD 60 Hz display.
In terms of options, the HDMI output can run either a 4K 30 Hz or QHD 60 Hz display. The USB-C/TB3 port can run up to 2x 4K 60 Hz displays or 3x QHD displays when using hardware that taps into its Thunderbolt 3 capabilities, or up to 1x 4K 60 Hz or 2x QHD displays when using hardware that only taps into regular USB-C (although if you're also running USB 3.x, the max would be 1x QHD or 2x FHD displays).
In terms of how to use that USB-C/TB3 port, there are various options:
A simple USB-C to DisplayPort cable. This could then become the first link of a DisplayPort daisy chain if your display supported daisy chaining.
A USB-C MST hub
A Thunderbolt 3 to Dual DisplayPort adapter
USB-C or Thunderbolt 3 dock, such as the WD19 or WD19TB, respectively
@quickguide01 One other reason for a docking station even if you only have 2 displays. Lots of people have more things than just displays connected to their docking station. For example, I have a docking station at my desk that has all of this connected to it:
2 displays
A USB 3.0 hub with multiple devices plugged into it
Speakers
An Ethernet cable
Many modern laptops do not have enough ports to connect all of those things directly to built-in ports. As it happens, my particular laptop WOULD allow me to connect all of those things directly, and even some more things beyond that, because it has a lot of ports. But I don't want to connect and disconnect 6 cables (those 5 items plus a power adapter) every single time I want to take my laptop with me or bring it back to my desk. A docking station means I don't have to do that. Instead I only have a single cable.
If i were to get a4k monitor or 4k TV... the cables i have would work with it right? With the monitor... i would use the usb c to display port cable? If i get a 4k tv and connect it to my laptop, i would use the usb c to hdmi cable? Both of my usb c cables support 60 hz right? I heard that some people who connect their big TV to their laptop, they have issues because it is only 30 hz and there is tons of lag which is basically unusable. But the usb cables i have.. both are 60 hz right?
So in my situation, what would be the cheapest way to get a three monitor external display? Im still deciding on if i should get either
32' 4K monitor
43 4K TV
Another 24' 1920 x 1200 monitor
If I get a 32' 4K monitor, I would use it with either one or two of my current 24' 1920 x 1200 monitors. Now if i only use it with just one of them, then I don't need to buy any other cable right?
If I get a 43 4K TV, I would either use it just by itself... or use it with one of my current 24' 1920 x 1200 monitors. Reason being my folding table is only 4 feet wide and 2 feet long so i'm not sure i have enough space for it. But either way, I wouldn't need to buy any new cable right?
If I get another 24' 1920 x 1200 monitor, thus I would have three total. I could use all of them with no issue assuming I don't use my laptop screen as a display right? And since none of these are 4k, well there is no issue here. But I still need a docking station for this or could i daisy chain it somehow with the three cables i already have? But im not sure how i can do this since there is only one usb c port and one hdmi port in my laptop.
Which option is the cheapest here? I wouldn't mind getting a third 24' 1920 x 1200 monitor. But I definitely would prefer getting a 4K monitor much more.
@quickguide01 Looks like I was writing my post while you were writing a follow-up post. You asked quite a few questions in that second post.
Short version: If you want to run a 4K display and 2 1080p displays, the most convenient way to do that would be a Dell WD19TB. With an XPS 15 9550, you'll need to connect the 4K 60 Hz display to the "downsteram" TB3 port at the edge of the dock, using something like a USB-C to DisplayPort or USB-C to HDMI 2.0 cable, adapter. Yes that dock is expensive, but it also delivers the benefit of having ALL of your connectivity, i.e. displays, USB 3.x, and enough power to run your system properly, running over a single cable. That means you don't need to keep the XPS 15's own power adapter connected separately. You can use that elsewhere or keep it in your bag as a dedicated on-the-go charger or something. If you wanted something less expensive, a Thunderbolt 3 to Dual DisplayPort adapter would allow you to run a 4K 60 Hz display and a 1080p display from your TB3 port, and then you could connect the other 1080p display to the system's built-in HDMI output. There are also TB3 to Dual HDMI 2.0 adapters if that would be more convenient based on the inputs available on your displays. But note that with ANY of these solutions that involve 3 external displays, you would have to be running Windows AND you would not be able to keep your built-in display active as well. If you need to do that, at least one display would need to be connected using "indirect display" technology like DisplayLink. I can get more into that if you actually need it.
In terms of your other questions:
You don't necessarily need a docking station to run 3 displays, as I just described above and in my previous post.
The newer Dell XPS laptops have dropped HDMI ports entirely. They have more USB-C/TB3 ports, and those can come in handy for directly connecting additional displays, but they're also useful for other purposes as well. I've never seen an XPS laptop with dual HDMI outputs, and that wouldn't really make sense. DisplayPort is a superior output because it offers more bandwidth, more capabilities (like daisy chaining to run multiple displays from a single output), and it's also royalty-free, whereas HDMI requires the manufacturer to pay a royalty for every port they use. USB-C ports use DisplayPort signaling for video output. USB-C to HDMI adapters need to incorporate an active signal converter chip to switch that signal over to HDMI.
Your system's GPU supports 3 displays.
The display combinations that are possible with a docking station are limited by the amount of video bandwidth available from the system to the docking station. That depends on the capabilities of the system and the docking station. I wrote a long explainer post about that here if you're really curious.
People with dual displays might want a docking station because they only want to connect and disconnect one cable from their system rather than dealing with 2. That might sound trivial, but if you do that multiple times per day in an office setting, having only one cable to deal with can be nice. And for docking stations that might be used by multiple people with different systems, some systems might not have a built-in HDMI output. In that case, that separate display wouldn't be usable with those other types of systems, whereas it would be if it was connected through the docking station.
@quickguide01 I think I already answered most of your new questions about how you'd connect your 3 displays in the second reply I wrote. But in terms of your additional general questions:
Most laptops on the market even today still cannot run 3x 4K 60 Hz external displays, and they definitely can't do it all through a single TB3 connection to a dock. Running 3x 4K 60 Hz displays requires more bandwidth than Thunderbolt 3 can support, and that's before considering that TB3 also needs to keep some bandwidth available to carry PCIe traffic to run non-video data used by the docking station, for things like Gigabit Ethernet, USB 3.x, etc. This may change when DisplayPort DSC becomes more widely implemented and/or another Thunderbolt standard arrives, but right now it just isn't possible. Even running 3x 4K 60 Hz displays by connecting 2 of them through a docking station and the third display directly to the system might not work. It depends on how many GPU outputs are wired from the GPU to the Thunderbolt/USB-C controller, and that information isn't always advertised in system specs. I'm not sure if even the latest XPS systems will run triple 4K 60 Hz. The new XPS 17 is a special case since if you order it with an RTX GPU, it has a BIOS option that allows the RTX GPU to take direct control of the display outputs, so it might be able to do that even if other XPS 17s and the XPS 15 can't, but I'm just not sure. It gets complicated when you push the edge of technology, and even Dell Support might not be able to give accurate answers to these questions. I've seen them give wrong answers to much simpler questions before. So if that's something you really wanted, I'd recommend seeing if you can find real world confirmation from someone who has run that setup from whatever system you're thinking about buying.
The cable mentions 8K support because it supports DisplayPort 1.4, which allows enough bandwidth for 8K (but only at 30 Hz, not the standard 60 Hz). But your system doesn't support DisplayPort 1.4.
Daisy chaining only works if you have a display that has a DisplayPort output in order to start a daisy chain. In that case, you could use your USB-C to DP cable to connect to that display, then use a DP cable to connect the output of that display to the input of a second display. Your system would see both displays and be able to use them independently. Before I got a docking station, I did this using a pair of Dell U2717D displays. It worked beautifully.
But if you don't have the right type of display to do that, then you'd need either a TB3 to Dual DP or Dual HDMI 2.0 adapter, or a docking station. I already went into more detail about that above.
@quickguide01 Your USB-C to DP cable would support 4K 60 Hz from your system. That only requires DisplayPort 1.2. Your system supports that, and the cable definitely does because that's the earliest revision of DisplayPort that was supported over USB-C.
In terms of your USB-C to HDMI cable, it depends on whether it supports HDMI 2.0. If it does, 4K 60 Hz will work. If not, then it will only support something less than that.
But since the XPS 15 9550 only has one USB-C/TB3 port, you obviously can't connect both of those cables directly to the system at the same time.
If you just want the cheap options rather than the convenience of a docking station, then the question of whether you end up getting a 4K 60 Hz display/TV or another 1920x1200 display makes a huge difference, because the bandwidth requirements of those displays are very different. If you only add another 1920x1200 display, you could keep running one of them off the HDMI output and then get a USB-C MST hub like this one to run the other 2. In fact technically you should be able to run 3x 1920x1200 displays off that MST hub. Note that that particular MST hub supports DisplayPort 1.4 and DSC, but it won't use those with your system since it doesn't support either of those. So some of the capabilities advertised by that adapter won't apply to your system. But it's good for futureproofing. It also has a USB-C power passthrough port, but since your system is designed for 130W, that wouldn't be good to use in your case. Still, like I said, you should be able to run 3x 1920x1200 displays from that hub even from your system.
If you go 4K, you'd need a TB3 to Dual DP adapter or TB3 to Dual HDMI 2.0 adapter. Put the 4K display and one of your 1920x1200 displays on that adapter, and put the other 1920x1200 display on the system's HDMI output. Note that if you go TB3 to Dual DP but you need to feed an HDMI input from one of those DP outputs, you'll need an active DisplayPort to HDMI cable/adapter. The much more common passive DP to HDMI adapters/cables won't work with that type of adapter for reasons I really don't feel like typing right now after I've just written everything else I already have. So if you get a 4K TV and at least one of your 1920x1200 displays also has an HDMI input, then going TB3 to Dual HDMI 2.0 would probably be better than TB3 to Dual DP. Good luck.
Hey jphughan, i posted my questions in the next post.
Well at the moment, i have two external monitors and of course my laptop screen as a third display. I do use the laptop external display but not that much. Like if i had the option of three external monitors vs what i have now... two external and one laptop screen, obviously i prefer external.
You are saying if i want to have a third external monitor... I can do this... but the laptop display will be turned off right? Well that wouldn't be that big of an issue. But to do this, i still need to buy a docking station right?
You say Each display can be up to 4K 60 Hz, but the XPS 15 9550 doesn't have a way to connect 3x 4K 60 Hz displays simultaneously. The closest you can get would be 2x 4K 60 Hz displays and then a 4K 30 Hz or QHD 60 Hz display.
So the newer dell xps models like the 9560 and later could connect 3 or more 4K 60 Hz displays simultaneously then?
These are the two current cables i have... i also have a hdmi to hdmi cable as well but no point of posting a link to that since hdmi to hdmi is a cable anyone can get.
Now the above link says its up to 8k... but im pretty certain when i bought the above cable above years ago it said up to 4K only.
I use the usb-c to display port with one of my monitors... and hdmi to hdmi with my other monitor. I also have usb-c to hdmi cable as well that i bought a while back that i posted the link to.
So if i want a third external monitor... i need to buy a docking station no matter what in my situation? You mention daisy chaining... i heard of it but not exactly sure how that works. But would it be possible to buy a third external monitor... and use it with my laptop somehow? Like with the usb-hdmi cable that i have but not using? Or would i need something else?
So to confirm, if i get the 4k monitor in the first link, i can connect it from my laptop with my usb-c to display port... then it would work 4k right? Then i use my hdmi to hdmi cable with my other current monitor... so i could use two monitors this way?
If i were to get that TV i posted... can i get 4k with my usb-c to hdmi cable? You say the tv need hdmi 2.0 or better... is that tv going to work? Its a samsung so higher end so i assume my cable would work? I thought i could just use the usb-c to hdmi cable that i have with it and it would work? Then if i use one of my current monitor along side it, well just use the hdmi to hdmi cable?
The last link is if i get another 24' 1920x1200 display. But if i do that, i will use three monitors. And you say i would just get that USB-C MST hub. So basically this would be the cheapest way to get a three monitor display then right? Get another of this monitor... then get this usb-c mst hub... connect all three monitors?
For me right now... I do not have any intention of using more than one 4k monitor because where im located, its expensive to even buy one of them compared to if i was in the US. So based on that... which suggestion would you suggest on my situation? I really want a 4k monitor as i never had one. Again if i were to use it... it would be most likely with just one of my current monitors.
But like you said... if i wanted to use it with both of my current monitors... i need that docking station right? Again, I don't plan to buy more than one 4k monitor right now as its so expensive. In the future, i might buy two of them. But if I do that... and only want to use those two 4k monitors as my setup, wouldn't that mean I only need to buy another hdmi 2.0 to hdmi 2.0 or hdmi 2.0 to display port on a second 4k monitor?
Also, there would be zero point of me in the future to ever get three 4k monitors right? Since you say no matter what, at most two monitors can be 60hz only? And you don't want the third monitor to be 30 hz since i heard using a monitor at that hz is horrible and laggy?
@quickguide01 I feel like I already answered a lot of the questions you're still asking, so I'll keep this short. (UPDATE: Well it ended up long anyway...)
I'm not really going to dig into the specs of every display or TV you're considering. I feel I've given you enough information that at this point you should be able to go find the specs of the products you're considering to make sure they will be suitable. Sometimes the product page on the vendor's website will have that type of information. If not, try to find the manual of that display/TV, which often lists detailed specs.
Again, a USB-C to DisplayPort cable will run 4K 60 Hz. So if you get a display that supports 4K 60 Hz and has a DisplayPort input, you'll be good to go. DisplayPort doesn't really exist on TVs. For HDMI, you'll need a USB-C to HDMI cable that supports HDMI 2.0, and then the HDMI input on the display/TV you're looking at will also need to support HDMI 2.0. Some 4K 60 Hz displays don't have HDMI 2.0 inputs, especially early ones that were created before the HDMI 2.0 standard existed. But any 4K 60 Hz TV will have at least one HDMI 2.0 input. (Some 4K 60 Hz TVs only support HDMI 2.0 on certain HDMI inputs and have to have an "Enhanced HDMI mode" enabled to run those ports in 2.0 mode. Again, the manual will help here.)
Yes, if you get a 4K 60 Hz display that you can connect to your system's USB-C port somehow, then you would also be able to run a 1920x1200 display from your HDMI output. I think this is the third time I've discussed that option.
As for 3x 1920x1200 displays, yes the MST hub is the cheapest way to do that if you don't have displays that support daisy chaining.
If you get a 4K display, you do NOT necessarily have to get a docking station in order to use that display with your other 2 displays. You could instead get a Thunderbolt 3 to Dual DisplayPort adapter or a Thunderbolt 3 to Dual HDMI 2.0 adapter. I've mentioned that option at least 3 times at this point. Here is an example from Amazon Mexico. You can run two displays through that type of adapter, even if BOTH of them are 4K 60 Hz, and you would still be able to run a third display from your system's HDMI output. Do NOT confuse that type of adapter with the much cheaper USB-C MST hub. A Thunderbolt 3 to Dual DP/HDMI 2.0 adapter can access much more video bandwidth than a USB-C MST hub.
But if you DO get a docking station like the WD19TB, then you could connect two 4K 60 Hz displays to the docking station. And again, with your system, one of those 4K displays would need to be connected to the downstream TB3 port on that dock, using a USB-C to DP cable or USB-C to HDMI 2.0 cable. The other 4K 60 Hz display could be connected to any other port on the dock. This is just due to how the WD19TB works with your type of system.
In terms of display recommendations, if you're already using two 1920x1200 displays, then I would only get a 4K display if it will be 43". The reason is that with 1920x1200 displays, you are very likely using the default 100% display scaling setting in Windows. But if you had a 32" 4K display, the pixel density of that setup would be high enough that you would need to enable scaling, maybe 125% or 150%. Windows does not work very well when using multiple display scaling factors simultaneously. I don't really want to get into that here either because that's another long explanation that I've already written up in other threads here, but basically if you can make sure that all active displays use the same scaling setting, things will look better overall. Otherwise, running multiple scaling factors simultaneously can cause certain displays to end up looking blurrier than they normally would.
In terms of whether to get a 43" 4K display or another 24" 1920x1200 display, those are very different products. I really can't help you there, but those products are different enough that you should be able to decide which one is a better choice.
But if you do decide to get a 24" 1920x1200 display, the U2412M you linked is quite old. Look at the U2415 instead. It has the same resolution, but it has slimmer bezels and a nicer panel, AND it supports daisy chaining. So if you got a U2415, you could use a USB-C to DP cable to connect it to your XPS 15, and then use a DP cable to connect the U2415's DP output to the DP input of another 1920x1200 display. (This assumes one of your existing 1920x1200 displays actually has a DP input.) In that case, you won't even need an MST hub because you'll be able to run 2 of your 1920x1200 displays from the USB-C port that way, and you'd still be able to connect a third 1920x1200 display to your system's HDMI output.
But if you do decide to get a 24" 1920x1200 display, the U2412M you linked is quite old. Look at the U2415 instead. It has the same resolution, but it has slimmer bezels and a nicer panel, AND it supports daisy chaining. So if you got a U2415, you could use a USB-C to DP cable to connect it to your XPS 15, and then use a DP cable to connect the U2415's DP output to the DP input of another 1920x1200 display. (This assumes one of your existing 1920x1200 displays actually has a DP input.) In that case, you won't even need an MST hub because you'll be able to run 2 of your 1920x1200 displays from the USB-C port that way, and you'd still be able to connect a third 1920x1200 display to your system's HDMI output.
My two monitors right now are ASUS C624BQ
Samsung syncmaster t240hd
Could i get the old U2412M in amazon.mx and then do it with these monitors i have now? They don't sell the one you mentioned... if they do sell it here... its really expensive. Could i make three monitor setup like you mentioned with buying just the U2412M with the current two monitors i have?
You say
In terms of display recommendations, if you're already using two 1920x1200 displays, then I would only get a 4K display if it will be 43". The reason is that with 1920x1200 displays, you are very likely using the default 100% display scaling setting in Windows. But if you had a 32" 4K display, the pixel density of that setup would be high enough that you would need to enable scaling, maybe 125% or 150%. Windows does not work very well when using multiple display scaling factors simultaneously. I don't really want to get into that here either because that's another long explanation that I've already written up in other threads here, but basically if you can make sure that all active displays use the same scaling setting, things will look better overall. Otherwise, running multiple scaling factors simultaneously can cause certain displays to end up looking blurrier than they normally would.
Thats very interesting. Yea I am using the default display setting in windows with my two current monitors. So i thought... what dpi would it use then with a 32" 4K display etc... Yea i heard the big TV would use the 100% display scaling setting in Windows. I get what you mean with this. Someone who has the big tv posted picture to me of how the tables look on their tv and said they using the 100% display scaling setting in Windows and it looked good to me.
Wow never thought that mixing the monitor with my monitor would have issue with that etc... But if i get the TV... i woudl only use it with one of my monitors at most because i dont have space on my table. There is a chance i might not be able to put even one monitor to the side of it... with the TV...
@quickguide01 Both of your current displays are 24". One is 1920x1200 and the other is 1920x1080. So yes a third 24" 1920x1200 display would work well with your current two displays. The U2412M would work fine, but since that display doesn't support daisy chaining and neither of your current displays do either, if you want to connect all 3 of those displays at the same time, you'll need to use one of the options I described earlier. Just buying the display on its own will not be enough since you won't have a way to connect all 3. I'm not going to describe those options again here since you can go back and read my earlier posts.
Scaling settings for TVs work a bit differently because although TVs are larger than typical displays, they are also typically viewed from farther away. So sometimes you might need to enable scaling even on a TV. But there's no single answer that applies to all scenarios here, because TVs with 4K resolution are available in a wide range of sizes, and people have a wide range of viewing distances from their TVs. But if you plan to have a TV on your desk, then if you want to use 4K resolution at 100% scaling in order to match your existing 24" displays, then like I said it should be about 43".
Both of my current displays are 24". Both are 1920x1200.
How do you know if both of my current monitors not support daisy chaining? The asus monitor i have doesn't? But buying the monitor you recommend would work because it works with daisy chaining. But that monitor is either hard to buy here... or its very expensive. So there are very few monitors that are capable of daisy chaining?
I spoke to someone else on this issue and he tells me he uses the same scalling of 100 percent on his old setup of two 27" QHD monitors. He said he nows uses a big tv 43" with a 27" as a side monitor and has the scaling still the same though. Does that make sense though? He said he has no issue with it at all.
@quickguide01 My mistake on resolutions. But 1920x1080 and 1920x1200 are close enough that they don't make a difference for the purposes of this discussion.
In order for a display to support creating a daisy chain, it needs to have a DisplayPort output. Your two displays don't seem to have one. Your current displays could be the LAST display in a daisy chain because the last display doesn't need an output in order to pass the signal along, but the FIRST display in the chain needs an output in order to connect to the second/last display.
Yes, most people can use 27" QHD displays at 100% scaling. Most people can also use 43" 4K displays at 100% scaling if they are sitting close to them. The important factor to consider is pixel density. Most people can use 100% scaling as long as the display's pixel density is less than 110 ppi. Here is a nice pixel density calculator if you want to experiment. You will find that 24" 1920x1200, 27" QHD, and 43" 4K all result in pixel densities less than 110 ppi.
quickguide01
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December 5th, 2020 10:00
How would one connect 3 external monitors to the dell xps 15 9550? I currently have 2 monitors 24' 1920x1200 connected to my monitors. One is the hdmi to hdmi to a monitor, the other is the usb-c to display port on the other monitor. I also have a 3rd cable... usb-c to hdmi as well.
I will most likely buy a 32' 4k monitor and considering using 3 monitors. But I would first plan to use the 32' 4k monitor with one of my 24' 1920x1200 monitors in the meantime. I am also considering a 43' 4k tv as well... deciding whether 32' 4k monitor or 43' 4k TV.
I would need to buy a docking station for this ... correct? Anyone can post a link on dell or amazon of what i would need? Because the dell xps 15 9550, while using the ports on the laptop, you can only connect 2 external monitors right since this old xps has 1 hdmi port and 1 usb-c port? So if you want 3 monitors or more, docking station is what you need to buy and the only way? What if i get another 24' 1920x1200 monitor and thus have three of them... is the docking station still only way?
Also, are the new dell xps laptops or laptops now in generally have more than 1 hdmi port and 1 usb-c port so you could connect 3 monitors? Example a laptop with a usb-c port and say 2 hdmi ports on the laptop? Or is that not possible? So basically a docking station is required if you want 3+ monitors right? But would I need to check if my graphics card for my laptop support 3 monitors?
Also I heard with a docking station, you either can only connect one or at most two external monitors with 4k display... is that correct? If so, why is it? So if someone had say two monitors of 27' 4k and one 32 4k monitor and wanted to connect all 3 external monitors to their laptop, they can't have all of them 4k even with a docking station?
Another thing im confused is this. I read people use docking station for their dual monitor setup. Why would anyone buy a docking station for two external monitor setup... if they could use their hdmi to hdmi cable with one monitor... and a usb-c to display port with their other monitor? Is it because their laptop only have hdmi and no usb-c port and thats why?
jphughan
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December 5th, 2020 10:00
@quickguide01 Your topic title says "Multiple Monitor Setup Questions", but your post doesn't ask any questions about multiple monitors. In fact it doesn't ask any questions at all. But if some general info helps, the XPS 15 can run up to 3 simultaneous independent displays, counting the built-in display if it's active. If you disable the built-in display, which can only be done on Windows (not Linux), then you can run 3 external displays. Each display can be up to 4K 60 Hz, but the XPS 15 9550 doesn't have a way to connect 3x 4K 60 Hz displays simultaneously. The closest you can get would be 2x 4K 60 Hz displays and then a 4K 30 Hz or QHD 60 Hz display.
In terms of options, the HDMI output can run either a 4K 30 Hz or QHD 60 Hz display. The USB-C/TB3 port can run up to 2x 4K 60 Hz displays or 3x QHD displays when using hardware that taps into its Thunderbolt 3 capabilities, or up to 1x 4K 60 Hz or 2x QHD displays when using hardware that only taps into regular USB-C (although if you're also running USB 3.x, the max would be 1x QHD or 2x FHD displays).
In terms of how to use that USB-C/TB3 port, there are various options:
Hopefully this helps a bit.
jphughan
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December 5th, 2020 11:00
@quickguide01 One other reason for a docking station even if you only have 2 displays. Lots of people have more things than just displays connected to their docking station. For example, I have a docking station at my desk that has all of this connected to it:
Many modern laptops do not have enough ports to connect all of those things directly to built-in ports. As it happens, my particular laptop WOULD allow me to connect all of those things directly, and even some more things beyond that, because it has a lot of ports. But I don't want to connect and disconnect 6 cables (those 5 items plus a power adapter) every single time I want to take my laptop with me or bring it back to my desk. A docking station means I don't have to do that. Instead I only have a single cable.
quickguide01
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December 5th, 2020 11:00
If i were to get a 4k monitor or 4k TV... the cables i have would work with it right? With the monitor... i would use the usb c to display port cable? If i get a 4k tv and connect it to my laptop, i would use the usb c to hdmi cable? Both of my usb c cables support 60 hz right? I heard that some people who connect their big TV to their laptop, they have issues because it is only 30 hz and there is tons of lag which is basically unusable. But the usb cables i have.. both are 60 hz right?
So in my situation, what would be the cheapest way to get a three monitor external display? Im still deciding on if i should get either
32' 4K monitor
43 4K TV
Another 24' 1920 x 1200 monitor
If I get a 32' 4K monitor, I would use it with either one or two of my current 24' 1920 x 1200 monitors. Now if i only use it with just one of them, then I don't need to buy any other cable right?
If I get a 43 4K TV, I would either use it just by itself... or use it with one of my current 24' 1920 x 1200 monitors. Reason being my folding table is only 4 feet wide and 2 feet long so i'm not sure i have enough space for it. But either way, I wouldn't need to buy any new cable right?
If I get another 24' 1920 x 1200 monitor, thus I would have three total. I could use all of them with no issue assuming I don't use my laptop screen as a display right? And since none of these are 4k, well there is no issue here. But I still need a docking station for this or could i daisy chain it somehow with the three cables i already have? But im not sure how i can do this since there is only one usb c port and one hdmi port in my laptop.
Which option is the cheapest here? I wouldn't mind getting a third 24' 1920 x 1200 monitor. But I definitely would prefer getting a 4K monitor much more.
jphughan
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December 5th, 2020 11:00
@quickguide01 Looks like I was writing my post while you were writing a follow-up post. You asked quite a few questions in that second post.
Short version: If you want to run a 4K display and 2 1080p displays, the most convenient way to do that would be a Dell WD19TB. With an XPS 15 9550, you'll need to connect the 4K 60 Hz display to the "downsteram" TB3 port at the edge of the dock, using something like a USB-C to DisplayPort or USB-C to HDMI 2.0 cable, adapter. Yes that dock is expensive, but it also delivers the benefit of having ALL of your connectivity, i.e. displays, USB 3.x, and enough power to run your system properly, running over a single cable. That means you don't need to keep the XPS 15's own power adapter connected separately. You can use that elsewhere or keep it in your bag as a dedicated on-the-go charger or something. If you wanted something less expensive, a Thunderbolt 3 to Dual DisplayPort adapter would allow you to run a 4K 60 Hz display and a 1080p display from your TB3 port, and then you could connect the other 1080p display to the system's built-in HDMI output. There are also TB3 to Dual HDMI 2.0 adapters if that would be more convenient based on the inputs available on your displays. But note that with ANY of these solutions that involve 3 external displays, you would have to be running Windows AND you would not be able to keep your built-in display active as well. If you need to do that, at least one display would need to be connected using "indirect display" technology like DisplayLink. I can get more into that if you actually need it.
In terms of your other questions:
You don't necessarily need a docking station to run 3 displays, as I just described above and in my previous post.
The newer Dell XPS laptops have dropped HDMI ports entirely. They have more USB-C/TB3 ports, and those can come in handy for directly connecting additional displays, but they're also useful for other purposes as well. I've never seen an XPS laptop with dual HDMI outputs, and that wouldn't really make sense. DisplayPort is a superior output because it offers more bandwidth, more capabilities (like daisy chaining to run multiple displays from a single output), and it's also royalty-free, whereas HDMI requires the manufacturer to pay a royalty for every port they use. USB-C ports use DisplayPort signaling for video output. USB-C to HDMI adapters need to incorporate an active signal converter chip to switch that signal over to HDMI.
Your system's GPU supports 3 displays.
The display combinations that are possible with a docking station are limited by the amount of video bandwidth available from the system to the docking station. That depends on the capabilities of the system and the docking station. I wrote a long explainer post about that here if you're really curious.
People with dual displays might want a docking station because they only want to connect and disconnect one cable from their system rather than dealing with 2. That might sound trivial, but if you do that multiple times per day in an office setting, having only one cable to deal with can be nice. And for docking stations that might be used by multiple people with different systems, some systems might not have a built-in HDMI output. In that case, that separate display wouldn't be usable with those other types of systems, whereas it would be if it was connected through the docking station.
jphughan
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December 5th, 2020 11:00
@quickguide01 I think I already answered most of your new questions about how you'd connect your 3 displays in the second reply I wrote. But in terms of your additional general questions:
Most laptops on the market even today still cannot run 3x 4K 60 Hz external displays, and they definitely can't do it all through a single TB3 connection to a dock. Running 3x 4K 60 Hz displays requires more bandwidth than Thunderbolt 3 can support, and that's before considering that TB3 also needs to keep some bandwidth available to carry PCIe traffic to run non-video data used by the docking station, for things like Gigabit Ethernet, USB 3.x, etc. This may change when DisplayPort DSC becomes more widely implemented and/or another Thunderbolt standard arrives, but right now it just isn't possible. Even running 3x 4K 60 Hz displays by connecting 2 of them through a docking station and the third display directly to the system might not work. It depends on how many GPU outputs are wired from the GPU to the Thunderbolt/USB-C controller, and that information isn't always advertised in system specs. I'm not sure if even the latest XPS systems will run triple 4K 60 Hz. The new XPS 17 is a special case since if you order it with an RTX GPU, it has a BIOS option that allows the RTX GPU to take direct control of the display outputs, so it might be able to do that even if other XPS 17s and the XPS 15 can't, but I'm just not sure. It gets complicated when you push the edge of technology, and even Dell Support might not be able to give accurate answers to these questions. I've seen them give wrong answers to much simpler questions before. So if that's something you really wanted, I'd recommend seeing if you can find real world confirmation from someone who has run that setup from whatever system you're thinking about buying.
The cable mentions 8K support because it supports DisplayPort 1.4, which allows enough bandwidth for 8K (but only at 30 Hz, not the standard 60 Hz). But your system doesn't support DisplayPort 1.4.
Daisy chaining only works if you have a display that has a DisplayPort output in order to start a daisy chain. In that case, you could use your USB-C to DP cable to connect to that display, then use a DP cable to connect the output of that display to the input of a second display. Your system would see both displays and be able to use them independently. Before I got a docking station, I did this using a pair of Dell U2717D displays. It worked beautifully.
But if you don't have the right type of display to do that, then you'd need either a TB3 to Dual DP or Dual HDMI 2.0 adapter, or a docking station. I already went into more detail about that above.
jphughan
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December 5th, 2020 11:00
@quickguide01 Your USB-C to DP cable would support 4K 60 Hz from your system. That only requires DisplayPort 1.2. Your system supports that, and the cable definitely does because that's the earliest revision of DisplayPort that was supported over USB-C.
In terms of your USB-C to HDMI cable, it depends on whether it supports HDMI 2.0. If it does, 4K 60 Hz will work. If not, then it will only support something less than that.
But since the XPS 15 9550 only has one USB-C/TB3 port, you obviously can't connect both of those cables directly to the system at the same time.
If you just want the cheap options rather than the convenience of a docking station, then the question of whether you end up getting a 4K 60 Hz display/TV or another 1920x1200 display makes a huge difference, because the bandwidth requirements of those displays are very different. If you only add another 1920x1200 display, you could keep running one of them off the HDMI output and then get a USB-C MST hub like this one to run the other 2. In fact technically you should be able to run 3x 1920x1200 displays off that MST hub. Note that that particular MST hub supports DisplayPort 1.4 and DSC, but it won't use those with your system since it doesn't support either of those. So some of the capabilities advertised by that adapter won't apply to your system. But it's good for futureproofing. It also has a USB-C power passthrough port, but since your system is designed for 130W, that wouldn't be good to use in your case. Still, like I said, you should be able to run 3x 1920x1200 displays from that hub even from your system.
If you go 4K, you'd need a TB3 to Dual DP adapter or TB3 to Dual HDMI 2.0 adapter. Put the 4K display and one of your 1920x1200 displays on that adapter, and put the other 1920x1200 display on the system's HDMI output. Note that if you go TB3 to Dual DP but you need to feed an HDMI input from one of those DP outputs, you'll need an active DisplayPort to HDMI cable/adapter. The much more common passive DP to HDMI adapters/cables won't work with that type of adapter for reasons I really don't feel like typing right now after I've just written everything else I already have. So if you get a 4K TV and at least one of your 1920x1200 displays also has an HDMI input, then going TB3 to Dual HDMI 2.0 would probably be better than TB3 to Dual DP. Good luck.
quickguide01
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December 5th, 2020 11:00
Hey jphughan, i posted my questions in the next post.
Well at the moment, i have two external monitors and of course my laptop screen as a third display. I do use the laptop external display but not that much. Like if i had the option of three external monitors vs what i have now... two external and one laptop screen, obviously i prefer external.
You are saying if i want to have a third external monitor... I can do this... but the laptop display will be turned off right? Well that wouldn't be that big of an issue. But to do this, i still need to buy a docking station right?
You say Each display can be up to 4K 60 Hz, but the XPS 15 9550 doesn't have a way to connect 3x 4K 60 Hz displays simultaneously. The closest you can get would be 2x 4K 60 Hz displays and then a 4K 30 Hz or QHD 60 Hz display.
So the newer dell xps models like the 9560 and later could connect 3 or more 4K 60 Hz displays simultaneously then?
These are the two current cables i have... i also have a hdmi to hdmi cable as well but no point of posting a link to that since hdmi to hdmi is a cable anyone can get.
usb-c to hdmi
https://www.amazon.com.mx/CHOETECH-Thunderbolt-compatibles-MacBook-Galaxy/dp/B06Y6448WB/ref=sr_1_5?__mk_es_MX=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=choetech+usb+c&qid=1607194723&sr=8-5
usb-c to display port
https://www.amazon.com/Cable-Matters-DisplayPort-USB-C-Supporting/dp/B01J6DT070/ref=sr_1_3?dchild=1&keywords=cable+matters+usb+c+displayport+cable&qid=1607195152&sr=8-3
Now the above link says its up to 8k... but im pretty certain when i bought the above cable above years ago it said up to 4K only.
I use the usb-c to display port with one of my monitors... and hdmi to hdmi with my other monitor. I also have usb-c to hdmi cable as well that i bought a while back that i posted the link to.
So if i want a third external monitor... i need to buy a docking station no matter what in my situation? You mention daisy chaining... i heard of it but not exactly sure how that works. But would it be possible to buy a third external monitor... and use it with my laptop somehow? Like with the usb-hdmi cable that i have but not using? Or would i need something else?
quickguide01
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December 5th, 2020 12:00
Hey there, thanks for the long response on this.
Okay so right now, you say my usb-c to dp cable would support 4K 60 Hz from your system.
These are the monitors or TV that im considering.
https://www.amazon.com.mx/Samsung-LU32J590UQLXZX-Monitor-Curved-3840/dp/B07G8TLL7Q/ref=sr_1_1?__mk_es_MX=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=samsung+4k+monitor&qid=1607199746&sr=8-1
https://www.amazon.com.mx/Samsung-Class-TU7000-UN43TU7000FXZX-Crystal/dp/B085B7X2Z9/ref=sr_1_6?__mk_es_MX=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=samsung+tv+43+inch+smart+tv+4k&qid=1607199712&sr=8-6
https://www.amazon.com.mx/Dell-Monitor-U2412M-24-Led/dp/B005JN9310/ref=sr_1_2?__mk_es_MX=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2QFQZJ0JJURFQ&dchild=1&keywords=dell+monitor+24&qid=1607199806&sprefix=dell+monitor+%2Caps%2C543&sr=8-2
So to confirm, if i get the 4k monitor in the first link, i can connect it from my laptop with my usb-c to display port... then it would work 4k right? Then i use my hdmi to hdmi cable with my other current monitor... so i could use two monitors this way?
If i were to get that TV i posted... can i get 4k with my usb-c to hdmi cable? You say the tv need hdmi 2.0 or better... is that tv going to work? Its a samsung so higher end so i assume my cable would work? I thought i could just use the usb-c to hdmi cable that i have with it and it would work? Then if i use one of my current monitor along side it, well just use the hdmi to hdmi cable?
The last link is if i get another 24' 1920x1200 display. But if i do that, i will use three monitors. And you say i would just get that USB-C MST hub. So basically this would be the cheapest way to get a three monitor display then right? Get another of this monitor... then get this usb-c mst hub... connect all three monitors?
For me right now... I do not have any intention of using more than one 4k monitor because where im located, its expensive to even buy one of them compared to if i was in the US. So based on that... which suggestion would you suggest on my situation? I really want a 4k monitor as i never had one. Again if i were to use it... it would be most likely with just one of my current monitors.
But like you said... if i wanted to use it with both of my current monitors... i need that docking station right? Again, I don't plan to buy more than one 4k monitor right now as its so expensive. In the future, i might buy two of them. But if I do that... and only want to use those two 4k monitors as my setup, wouldn't that mean I only need to buy another hdmi 2.0 to hdmi 2.0 or hdmi 2.0 to display port on a second 4k monitor?
Also, there would be zero point of me in the future to ever get three 4k monitors right? Since you say no matter what, at most two monitors can be 60hz only? And you don't want the third monitor to be 30 hz since i heard using a monitor at that hz is horrible and laggy?
jphughan
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December 5th, 2020 14:00
@quickguide01 I feel like I already answered a lot of the questions you're still asking, so I'll keep this short. (UPDATE: Well it ended up long anyway...)
I'm not really going to dig into the specs of every display or TV you're considering. I feel I've given you enough information that at this point you should be able to go find the specs of the products you're considering to make sure they will be suitable. Sometimes the product page on the vendor's website will have that type of information. If not, try to find the manual of that display/TV, which often lists detailed specs.
Again, a USB-C to DisplayPort cable will run 4K 60 Hz. So if you get a display that supports 4K 60 Hz and has a DisplayPort input, you'll be good to go. DisplayPort doesn't really exist on TVs. For HDMI, you'll need a USB-C to HDMI cable that supports HDMI 2.0, and then the HDMI input on the display/TV you're looking at will also need to support HDMI 2.0. Some 4K 60 Hz displays don't have HDMI 2.0 inputs, especially early ones that were created before the HDMI 2.0 standard existed. But any 4K 60 Hz TV will have at least one HDMI 2.0 input. (Some 4K 60 Hz TVs only support HDMI 2.0 on certain HDMI inputs and have to have an "Enhanced HDMI mode" enabled to run those ports in 2.0 mode. Again, the manual will help here.)
Yes, if you get a 4K 60 Hz display that you can connect to your system's USB-C port somehow, then you would also be able to run a 1920x1200 display from your HDMI output. I think this is the third time I've discussed that option.
As for 3x 1920x1200 displays, yes the MST hub is the cheapest way to do that if you don't have displays that support daisy chaining.
If you get a 4K display, you do NOT necessarily have to get a docking station in order to use that display with your other 2 displays. You could instead get a Thunderbolt 3 to Dual DisplayPort adapter or a Thunderbolt 3 to Dual HDMI 2.0 adapter. I've mentioned that option at least 3 times at this point. Here is an example from Amazon Mexico. You can run two displays through that type of adapter, even if BOTH of them are 4K 60 Hz, and you would still be able to run a third display from your system's HDMI output. Do NOT confuse that type of adapter with the much cheaper USB-C MST hub. A Thunderbolt 3 to Dual DP/HDMI 2.0 adapter can access much more video bandwidth than a USB-C MST hub.
But if you DO get a docking station like the WD19TB, then you could connect two 4K 60 Hz displays to the docking station. And again, with your system, one of those 4K displays would need to be connected to the downstream TB3 port on that dock, using a USB-C to DP cable or USB-C to HDMI 2.0 cable. The other 4K 60 Hz display could be connected to any other port on the dock. This is just due to how the WD19TB works with your type of system.
In terms of display recommendations, if you're already using two 1920x1200 displays, then I would only get a 4K display if it will be 43". The reason is that with 1920x1200 displays, you are very likely using the default 100% display scaling setting in Windows. But if you had a 32" 4K display, the pixel density of that setup would be high enough that you would need to enable scaling, maybe 125% or 150%. Windows does not work very well when using multiple display scaling factors simultaneously. I don't really want to get into that here either because that's another long explanation that I've already written up in other threads here, but basically if you can make sure that all active displays use the same scaling setting, things will look better overall. Otherwise, running multiple scaling factors simultaneously can cause certain displays to end up looking blurrier than they normally would.
In terms of whether to get a 43" 4K display or another 24" 1920x1200 display, those are very different products. I really can't help you there, but those products are different enough that you should be able to decide which one is a better choice.
But if you do decide to get a 24" 1920x1200 display, the U2412M you linked is quite old. Look at the U2415 instead. It has the same resolution, but it has slimmer bezels and a nicer panel, AND it supports daisy chaining. So if you got a U2415, you could use a USB-C to DP cable to connect it to your XPS 15, and then use a DP cable to connect the U2415's DP output to the DP input of another 1920x1200 display. (This assumes one of your existing 1920x1200 displays actually has a DP input.) In that case, you won't even need an MST hub because you'll be able to run 2 of your 1920x1200 displays from the USB-C port that way, and you'd still be able to connect a third 1920x1200 display to your system's HDMI output.
Hopefully this is enough for you to work with.
quickguide01
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December 6th, 2020 21:00
Hey thanks for the long response. You say
But if you do decide to get a 24" 1920x1200 display, the U2412M you linked is quite old. Look at the U2415 instead. It has the same resolution, but it has slimmer bezels and a nicer panel, AND it supports daisy chaining. So if you got a U2415, you could use a USB-C to DP cable to connect it to your XPS 15, and then use a DP cable to connect the U2415's DP output to the DP input of another 1920x1200 display. (This assumes one of your existing 1920x1200 displays actually has a DP input.) In that case, you won't even need an MST hub because you'll be able to run 2 of your 1920x1200 displays from the USB-C port that way, and you'd still be able to connect a third 1920x1200 display to your system's HDMI output.
My two monitors right now are ASUS C624BQ
Samsung syncmaster t240hd
Could i get the old U2412M in amazon.mx and then do it with these monitors i have now? They don't sell the one you mentioned... if they do sell it here... its really expensive. Could i make three monitor setup like you mentioned with buying just the U2412M with the current two monitors i have?
You say
In terms of display recommendations, if you're already using two 1920x1200 displays, then I would only get a 4K display if it will be 43". The reason is that with 1920x1200 displays, you are very likely using the default 100% display scaling setting in Windows. But if you had a 32" 4K display, the pixel density of that setup would be high enough that you would need to enable scaling, maybe 125% or 150%. Windows does not work very well when using multiple display scaling factors simultaneously. I don't really want to get into that here either because that's another long explanation that I've already written up in other threads here, but basically if you can make sure that all active displays use the same scaling setting, things will look better overall. Otherwise, running multiple scaling factors simultaneously can cause certain displays to end up looking blurrier than they normally would.
Thats very interesting. Yea I am using the default display setting in windows with my two current monitors. So i thought... what dpi would it use then with a 32" 4K display etc... Yea i heard the big TV would use the 100% display scaling setting in Windows. I get what you mean with this. Someone who has the big tv posted picture to me of how the tables look on their tv and said they using the 100% display scaling setting in Windows and it looked good to me.
Wow never thought that mixing the monitor with my monitor would have issue with that etc... But if i get the TV... i woudl only use it with one of my monitors at most because i dont have space on my table. There is a chance i might not be able to put even one monitor to the side of it... with the TV...
jphughan
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December 6th, 2020 22:00
@quickguide01 Both of your current displays are 24". One is 1920x1200 and the other is 1920x1080. So yes a third 24" 1920x1200 display would work well with your current two displays. The U2412M would work fine, but since that display doesn't support daisy chaining and neither of your current displays do either, if you want to connect all 3 of those displays at the same time, you'll need to use one of the options I described earlier. Just buying the display on its own will not be enough since you won't have a way to connect all 3. I'm not going to describe those options again here since you can go back and read my earlier posts.
Scaling settings for TVs work a bit differently because although TVs are larger than typical displays, they are also typically viewed from farther away. So sometimes you might need to enable scaling even on a TV. But there's no single answer that applies to all scenarios here, because TVs with 4K resolution are available in a wide range of sizes, and people have a wide range of viewing distances from their TVs. But if you plan to have a TV on your desk, then if you want to use 4K resolution at 100% scaling in order to match your existing 24" displays, then like I said it should be about 43".
quickguide01
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December 7th, 2020 17:00
Hey. You say
One is 1920x1200 and the other is 1920x1080.
Both of my current displays are 24". Both are 1920x1200.
How do you know if both of my current monitors not support daisy chaining? The asus monitor i have doesn't? But buying the monitor you recommend would work because it works with daisy chaining. But that monitor is either hard to buy here... or its very expensive. So there are very few monitors that are capable of daisy chaining?
I spoke to someone else on this issue and he tells me he uses the same scalling of 100 percent on his old setup of two 27" QHD monitors. He said he nows uses a big tv 43" with a 27" as a side monitor and has the scaling still the same though. Does that make sense though? He said he has no issue with it at all.
jphughan
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December 7th, 2020 18:00
@quickguide01 My mistake on resolutions. But 1920x1080 and 1920x1200 are close enough that they don't make a difference for the purposes of this discussion.
In order for a display to support creating a daisy chain, it needs to have a DisplayPort output. Your two displays don't seem to have one. Your current displays could be the LAST display in a daisy chain because the last display doesn't need an output in order to pass the signal along, but the FIRST display in the chain needs an output in order to connect to the second/last display.
Yes, most people can use 27" QHD displays at 100% scaling. Most people can also use 43" 4K displays at 100% scaling if they are sitting close to them. The important factor to consider is pixel density. Most people can use 100% scaling as long as the display's pixel density is less than 110 ppi. Here is a nice pixel density calculator if you want to experiment. You will find that 24" 1920x1200, 27" QHD, and 43" 4K all result in pixel densities less than 110 ppi.
quickguide01
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December 8th, 2020 18:00
Hi. I connect usb-c to display port on my asus monitor. That isn't display port output? I notice you bolded output.
So with my situation, what would you recommend?