Many Ultrawide monitors with 5120×1440 resolutions (dual-QHD/32:9) just don’t seem to sync on Intel HD 610, HD 620, UHD 630 and similar GPUs. 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 some versions of the Intel GPU driver software. For best performance, it may help to update your Intel GPU driver then set the following regkey:

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

If you haven’t had the pleasure of using a Dual-QHD 5120×1440 monitor, here are a few 49″ models that will work with the fix:

Thanks to /u/DIEtRabbit for inspiring this article