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DisplayPort monitor for XPS 9560

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I've gotten myself in a bit of a mess. I accidentally purchased a monitor with no HDMI input (S24E450D). I've always used HDMI connections before for external monitors so I have no experience with more modern connection types. So I went and bought a displayport-to-hdmi adapter (NX50715 0.5), but it's not working. 

Is there any way to make this monitor work with the parts I have? If not, what are my other options? Thank you very much.

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Re: DisplayPort monitor for XPS 9560

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@crmccar  you need a USB-C to DisplayPort cable.  DisplayPort to HDMI cables can only be used to connect a DisplayPort source to an HDMI input, not the other way around.  That's because most (but not all) DisplayPort source ports can fall back to HDMI signaling for compatibility, using a mechanism called "Dual Mode DisplayPort", but HDMI ports cannot switch to DisplayPort signaling, and displays do not support receiving a native HDMI signal on their DisplayPort inputs.

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Re: DisplayPort monitor for XPS 9560

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@crmccar  you need a USB-C to DisplayPort cable.  DisplayPort to HDMI cables can only be used to connect a DisplayPort source to an HDMI input, not the other way around.  That's because most (but not all) DisplayPort source ports can fall back to HDMI signaling for compatibility, using a mechanism called "Dual Mode DisplayPort", but HDMI ports cannot switch to DisplayPort signaling, and displays do not support receiving a native HDMI signal on their DisplayPort inputs.

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Re: DisplayPort monitor for XPS 9560

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@jphughan Thank you for the explanation. When reading up on this, I heard about issues with the XPS's USB-C port. Is that something I'll likely have to deal with?

And for a 1080p monitor, I don't need a Thunderbolt cable, right? Any usb-c to displayport adapter/cable would do?

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Re: DisplayPort monitor for XPS 9560

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@crmccar  there's a known issue with the USB-C ports of the XPS 13 9350 and XPS 15 9550, but that only comes into play when using a regular USB-C cable to connect to certain Dell USB-C displays.  And there's a known issue with the XPS 15 9570's HDMI output whereby it doesn't work with DVI displays.  But none of that applies to your system or overall display scenario.

You don't need a Thunderbolt cable, and in fact if your display doesn't have a USB-C connector input (does it?), then a Thunderbolt cable would be completely useless to you.  But even if your display does have a USB-C port, and therefore a Thunderbolt cable would be usable, it would still be unnecessary.  The vast majority of displays with USB-C connector inputs just use regular USB-C.  There are very few displays that actually use native Thunderbolt.  Apple has an old display that used Thunderbolt 2, and the only Thunderbolt 3 display I know of is LG's SuperFine 5K display (5120x2880) -- and then Apple has a new 6K XDR display coming out that will use that as well.  But the XPS 15 systems wouldn't even support those 5K or 6K resolutions anyway due to GPU limitations.

A USB-C to DisplayPort cable would allow you to run up to 4K 60 Hz.  The only reason you'd need Thunderbolt would be if you wanted to run two of those from that same port, in which case you WOULD need the extra bandwidth that Thunderbolt offered, and you'd have to use something like a Thunderbolt 3 to Dual DisplayPort adapter or a full Thunderbolt dock like the WD19TB to achieve that.

Yes, any USB-C to DisplayPort cable will do.  The XPS 15 only supports DisplayPort 1.2 over USB-C, which was the first DisplayPort revision that was supported on USB-C, so every USB-C to DP cable will support that.  And a 1080p display only requires about 25% of the bandwidth available over DP 1.2 anyway. 🙂

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Re: DisplayPort monitor for XPS 9560

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I ended up buying this: https://www.amazon.com/Displayport-QGeeM-Thunderbolt-Compatible-MacBook/dp/B07V2ZM8DF/ref=sr_1_5?dch...

Hopefully it's correct. Thanks so much for your help!

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Re: DisplayPort monitor for XPS 9560

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@crmccar  should be fine!  The note about "Thunderbolt compatible" just means it works on systems that have Thunderbolt-capable USB-C ports as opposed to just USB-C ports that support DisplayPort Alt Mode.  The cable won't work any BETTER on a Thunderbolt port, and all USB-C to DP cables are inherently Thunderbolt-compatible, but some manufacturers include that compatibility note purely to avoid having customers constantly ask, "My system has Thunderbolt -- will this cable work?" -- or worse, losing sales entirely from prospective customers who just assumed that it wouldn't work without bothering to ask, or perhaps bought the same type of cable from some OTHER vendor whose product page specifically said "Thunderbolt compatible" to reassure them -- even though that other vendor didn't have to do anything special at all to make their cable Thunderbolt compatible.

It would be a bit like selling a USB cable that said "Works with printers".  That wouldn't mean there was anything special about that particular USB cable -- but I guarantee you that if some USB cable vendor started doing that, other competing vendors would be forced to update their own product pages to say that as well, just to avoid confusion or lost sales from customers who would now become confused/concerned about USB cables that didn't explicitly specify printer compatibility.

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