XPS

2 Bronze

XPS 15 9500, 2 4K monitors?

Hi, 

I am looking to buy an XPS 15 9500 with the following specs:

  • Intel® Core™ i7-10750H Processor
  • RAM: 16 GB / Storage: 1 TB SSD
  • Graphics: NVIDIA GeForce GTX 1650 Ti 4 GB
  • Full HD screen

Would this be able to run my 2, 4K monitors at 60hz? Would I need an accessory? If so which one. 

 

 

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7 Thorium

@PierJ1  Yes you can run dual 4K 60 Hz displays, but I want to provide a bit more background to build on the answers from @iniy  and @jdrodrig.  Using single USB-C port in non-Thunderbolt mode would only allow enough bandwidth for a single 4K 60 Hz display, and actually if you connect to a USB-C display that attempts to run USB 3.x rather than just USB 2.0, then you'd only have enough bandwidth for a single 4K 30 Hz display.  This is because the XPS 15 9500 only supports DisplayPort 1.2/HBR2 over USB-C, not DisplayPort 1.4/HBR3.  The specs on Dell's site claiming that the non-Thunderbolt port on the right supports DP 1.4 are incorrect.

However, if you were willing to connect both displays separately rather than using a daisy chain, then you COULD run two separate 4K 60 Hz displays both over USB-C, either using USB-C to DP cables or if you had a USB-C display that supported being configured to only run USB 2.0 to maximize video bandwidth.

If you want to run dual 4K 60 Hz from a single connector, you'd need a Thunderbolt 3 solution.  The simplest and least expensive solution there is a TB3 to Dual DisplayPort adapter.  Those are made by vendors such as StarTech, OWC, Sonnet, Sabrent, and Plugable.  All of those vendors have a solid reputation for quality products.  The downside here is that you're using that port only for video output, not power or USB data.

The even better solution would be a Thunderbolt 3 dock, since that would give you a single cable solution that would carry enough video bandwidth for dual 4K 60 Hz displays, plus USB 3.x data, plus power.  But since you have an XPS 15 9500 with a GeForce GPU, your only real choice here is the Dell WD19TB dock.  The reason is that that system is designed for a 130W power source, which is actually more than the 100W max of the USB PD spec.  Dell did something proprietary on some of their docks and systems (and one USB-C power adapter) to stretch the spec to carry 130W, but you won't find that on non-Dell products, and even Dell's own USB-C displays as of this writing don't support pushing that much power.  But the WD19TB does.  Otherwise, if you go with another dock that provides less power, you'd have to either keep the XPS 15's power adapter connected as well so that you have full power available, or else put up with slower battery charging and reduced performance that will result from running your system from an undersized power source.

Hopefully this helps!


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Replies (36)
2 Bronze

Yes, it will drive 2 4k monitors on 60hz, you don't even need any additional accesories, you can connect them through usb-c (if your monitors have such connector) or through displayport to usb-c adapter cables. 
There are also 2xdisplayport to usb-c adapters (look under the name "dual displayport to usb c" if you wanna save one tb3 port. 
You can also go with some thunderbolt 3 docking station.  

2 Iron

Agreed with the other, with only the clarification that you want a thunderbolt3 to dual display port adapter. I dont think a USB-C (without thunderbolt3) has the bandwidth of two 4k@60hz.

something like the link below should work. the adapter is not cheap, so you might be better off putting a little bit more money and get a Tb3 dock with two display ports and other perks.

 sorry, I am new to this platform it seems links are blocked. Amazon sells one Sabrent Thunderbolt 3 to dual display adapter, that cost about $80.

7 Thorium

@PierJ1  Yes you can run dual 4K 60 Hz displays, but I want to provide a bit more background to build on the answers from @iniy  and @jdrodrig.  Using single USB-C port in non-Thunderbolt mode would only allow enough bandwidth for a single 4K 60 Hz display, and actually if you connect to a USB-C display that attempts to run USB 3.x rather than just USB 2.0, then you'd only have enough bandwidth for a single 4K 30 Hz display.  This is because the XPS 15 9500 only supports DisplayPort 1.2/HBR2 over USB-C, not DisplayPort 1.4/HBR3.  The specs on Dell's site claiming that the non-Thunderbolt port on the right supports DP 1.4 are incorrect.

However, if you were willing to connect both displays separately rather than using a daisy chain, then you COULD run two separate 4K 60 Hz displays both over USB-C, either using USB-C to DP cables or if you had a USB-C display that supported being configured to only run USB 2.0 to maximize video bandwidth.

If you want to run dual 4K 60 Hz from a single connector, you'd need a Thunderbolt 3 solution.  The simplest and least expensive solution there is a TB3 to Dual DisplayPort adapter.  Those are made by vendors such as StarTech, OWC, Sonnet, Sabrent, and Plugable.  All of those vendors have a solid reputation for quality products.  The downside here is that you're using that port only for video output, not power or USB data.

The even better solution would be a Thunderbolt 3 dock, since that would give you a single cable solution that would carry enough video bandwidth for dual 4K 60 Hz displays, plus USB 3.x data, plus power.  But since you have an XPS 15 9500 with a GeForce GPU, your only real choice here is the Dell WD19TB dock.  The reason is that that system is designed for a 130W power source, which is actually more than the 100W max of the USB PD spec.  Dell did something proprietary on some of their docks and systems (and one USB-C power adapter) to stretch the spec to carry 130W, but you won't find that on non-Dell products, and even Dell's own USB-C displays as of this writing don't support pushing that much power.  But the WD19TB does.  Otherwise, if you go with another dock that provides less power, you'd have to either keep the XPS 15's power adapter connected as well so that you have full power available, or else put up with slower battery charging and reduced performance that will result from running your system from an undersized power source.

Hopefully this helps!


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 Hi, can you please clarify a little bit more this situation cause i have the same one "But since you have an XPS 15 9500 with a GeForce GPU, your only real choice here is the Dell WD19TB dock"

So, I have XPS 15 9500 and docking station WD19TB. I have two 4k S2721 monitors.

I cant get 60Hz at 4k on both screen no matter what I do. I updated all my drivers on laptop and docking station.

As I understood I have these two options:

• HDMI2.0 + USB
Type-C TB: 4K
(3840 x 2160)
@60Hz
• MFDP Type-C +
USB Type-C TB:
4K (3840 x 2160)
@60Hz

 

I went for first one with HDMI and USB C TB. For USB C TB I used adapter that I got with laptop so it converts USB C to HDMI. Is that reason why I have only 30Hz on one of the screens? Should I buy specific adapter?

Thanks a lot

 

@unknown1950 Just to confirm, make sure you're using the Type-C port at the edge of the dock, not the Type-C port near the HDMI output.  If you've already confirmed that, there are some USB-C to HDMI adapters that don't support 4K 60 Hz, but the first test to run would be to see whether you can get 4K 60 Hz on each display through its current cabling when it is the only display connected.  Does that work?  If so, then the adapter is not your issue.  In that case, I've read about some issues with certain Dell systems and the WD19TB when running dual 4K 60 Hz.  The XPS 13 9300 had some issues at least early on; not sure whether those were fixed.  So make sure your BIOS is current and that the WD19TB firmware is current.  If even that doesn't resolve it, user decker12 on this forum supports a business that has a lot of these and uses them with dual 4K 60 Hz displays, and he's found that the most reliable connection is to use the two USB-C ports with USB-C to DisplayPort cables.  The system outputs DisplayPort over TB3 natively, which means the dock's USB-C outputs also output DisplayPort natively.  USB-C to HDMI adapters have to incorporate active signal converter chips to switch that over to HDMI, and I've also seen multiple cases here where users had an adapter like that and found that it worked with one system and not another, even though it should have worked with both.  And in all of those cases, the fix was just to try another brand of adapter, which ended up working with both.  Complexity can decrease reliability.  And just fyi, since your displays support G-Sync, you'd have to use DisplayPort in order to use G-Sync anyway -- but that's irrelevant in this specific case because the display outputs on the XPS 15 9500 are wired to the Intel GPU rather than the NVIDIA GPU, which means you can't run G-Sync no matter what.


Hi ,

thanks for fast reply.

Yes, I'm using Type-C port at the edge of the dock. I cant get 4k display at 60Hz when using Type C - port -> HDMI. However, I can get 4k on the DP and HDMI port no matter which display I connect. So, so far it seems to me like the adapter could be issue. I will try some of your suggestions and keep you updated. 

 

Thanks

@unknown1950 Ok, as one last test, try connecting the USB-C to HDMI adapter to the USB-C port near the HDMI output while the other display is completely disconnected.  If you still can't get 4K 60 Hz even in that setup, then yes the adapter is the likely issue.  If you replace it, I'd suggest going USB-C to DisplayPort instead, simply to end up with a simpler adapter.


Hi,

so in the end, I bought right adapter (ucb c to display port) that supports 4k 60Hz. The one I got with the laptop obviously doesn't support 4k 60Hz. 

My configuration is Dell XPS 15 9500 connected on the docking station wd19tb. One monitor is connected USB C to DisplayPort. USB C is located on the edge of docking station. The other monitor HDMI to HDMI.

60hz 4k on both of them.

Thanks for support. I hope my solution will help someone.

Cheers

@unknown1950  Ah, you should have mentioned that you were previously using the USB-C to HDMI adapter that came with the system.  That adapter DOES support 4K 60 Hz, but only when used with a system that supports DisplayPort 1.4/HBR3.  The reason is that the adapter always configures the USB data path to support USB 3.x, and when you do that, your video bandwidth gets cut in half.  A half-bandwidth DP 1.4/HBR3 link is still enough to run 4K 60 Hz, but the XPS 15 9500 only supports DP 1.2/HBR2, and a half-bandwidth HBR2 link is only enough for 4K 30 Hz (or 1440p 60 Hz).  The only way to run 4K 60 Hz from an HBR2 system over regular USB-C (meaning without Thunderbolt) is to limit USB data speeds to USB 2.0.  It might have been nice if the adapter supported being configured for "4K 60 Hz + USB 2.0" or "4K 30 Hz + USB 3.x" given that the adapter is being bundled with HBR2 systems, but that isn't possible.


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