5120×1440 49″ Ultrawide on Intel HD Graphics GPUs

Many Ultrawide monitors with 5120×1440 resolutions (aka Dual-QHD or 32:9) just don’t seem to sync on Intel HD 610, HD 620, UHD 630, Iris Graphics, and NVIDA+Intel GPU systems like the Surface Book 3. Instead, they sync to lower resolutions such as 2560×1440 or 1920×1080. These Intel GPUs support 3840×2160 @ 60Hz (4K) just fine – a resolution that consumes 11% more bandwidth than 5120×1440. So what gives?

It seems the issue is an arbitrary horizontal pixel clock limit in specific versions of the Intel GPU driver software.

Solution 1

The least intrusive workaround is to set the following regkey and reboot:

Windows Registry Editor Version 5.00
;Enable 5K mode for Intel UWD/DCH drivers - dancharblog
;
; -----Instructions: -----
;- copy this text into notepad
;- save as enable5k.reg
;- double-click the file and follow the prompts to import changes
;- reboot
;- if the changes don't do anything, in the line below that starts with "[HKEY_" change "\0001]" to "\0000]" or "\0002]" and retry the above steps
; ------------------------ 
;
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001]
"Enable5kModeSupport"=dword:00000001

Solution 2

Another approach is to update the Intel GPU driver software and install the Intel command center. After rebooting, you should be able to select the missing ultrawide resolutions in the Windows settings app and/or the Intel command center app.

Solution 3

If neither of the above solutions work and you are using a Docking station, check to see if the docking station has updated firmware available. For example, updates for the Surface Dock 2 fix issues with some ultrawide monitors. If you continue to have problems, it may be the monitor cable or adapter. Older adapters and cables may not be able to carry high bandwidth signals reliably. If that’s the case, look into upgrading your cables/adapters to the latest generation.

And if you haven’t had the pleasure of using a Dual-QHD 5120×1440 monitor, here are a few 49″ models:

• AOC AGON AG493UCX
• Dell U4919DW
• LG 49WL95C-W
• Philips Brilliance 499P9H
• Samsung Odyssey G9 LC49G95TSSNXZA
• Sceptre C505B-QSN168
• Viotek SUW49DA

5Kx2K (5120×2160) WUHD Ultrawide monitors are also available – but these use 33% more bandwidth than 4K and may not run at full resolution or refresh rates on older systems:

• LG 34WK95U 34″
• MSI PS341WU 34″
• Dell U4021QW 40″

References:

• Dell regkey patch
• https://www.intel.com/content/www/us/en/support/articles/000056204/graphics.html

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Thanks to /u/DIEtRabbit for inspiring this article