topic Re: Unable to Display 2560×1440 Resolution on 3rd monitor in Mobile and Desktop Processors

Unable to Display 2560×1440 Resolution on 3rd monitor

nitehike — Sun, 05 Jun 2022 15:19:10 GMT

Dell XPS-8930 Tower PC with below details.

Processor: Intel® Core i7-9700 CPU @ 3.00GHz

Display Adapter: Intel® UHD Graphics 630 (27.20.100.8854)

Operating System: Microsoft Windows 10 Pro (10.0.19044 Build 19044)

3 Lenovo ThinkVision P24h-10 monitors connected using Display Port connection from the PC to 1st monitor and then daisy chain from 1st to 2nd and 2nd to 3rd monitor.

The first two monitors show 2560 x 1440 resolution, but the 3rd monitor shows 1920 x 1080 resolution.

How can I get 2560 x 1440 resolution on the 3rd monitor also?

Note: Please feel free to navigate this support question among appropriate teams/s or board/s.

Re: Unable to Display 2560×1440 Resolution on 3rd monitor

n_scott_pearson — Mon, 06 Jun 2022 06:46:19 GMT

Your processor supports DisplayPort 1.2. The maximum bandwidth of a DisplayPort 1.2 channel is 17.28 Gb/s. A 1440p@60Hz monitor consumes 5.63 Gb/s. Three such monitors will consume 16.89 Gb/s. If there is any - even trivial - bandwidth loss due to cable or MST quality or interference issues, that third monitor is not going to be supportable and will end up falling back to 1080p@60Hz. You can try improving the quality of the cables being used, but this may simply not be enough.

Hope this helps,

...S

Re: Unable to Display 2560×1440 Resolution on 3rd monitor

megan3000 — Mon, 06 Jun 2022 23:29:40 GMT

Why are you connecting all the displays through one single DP output from the computer?

I'm seeing the Back panel on Dell XPS 8930 comes also with an HDMI port...

https://www.dell.com/support/manuals/en-us/xps-8930-desktop/xps-8930-setup-and-specification/back-panel?guid=guid-877ba665-2ca4-4167-98b8-83d31e6cc7cc&lang=en-us&lwp=rt

How about trying 2 displays through DP daisy chain and the third one through HDMI? Your displays seem to include 2 HDMI ports

https://psref.lenovo.com/syspool/Sys/PDF/datasheet/ThinkVision_P24h_datasheet_EN.pdf