Acer xg270hu Windows 10 DVI Dual Link stuck at 60hz

[Wargasm]

I do have a DP cable which gets me 144hz as expected but I have one of the older versions of this monitor which has a firmware problem making the overdrive feature not work over DP with FreeSync compatible cards causing awful motion blur and noticeable input lag. I'm in the process of arranging to get it sent in for a firmware upgrade and will do as soon as Acer decides to get back to me as they said they would.

For now I'm trying to connect over DVI Dual Link but the maximum I can set the refresh rate to is 60 and Crimson drivers report 75hz maximum resolution. I'm on Windows 10 which picks the monitor up as a Generic PNP Monitor. I've tried the drivers from the Acer site which are for Win 7/8.1 (they don't have any drivers for Win 10) and installed by disabling driver signature but this didn't seem to work either so with these drivers I'm still stick at 60hz.

I've also tried using CRU to create a custom resolution. I'm not sure if I'm doing it right, but what I did was just create a resolution of 2560X1440 @ 120hz (I'm not expecting 144hz at 1440p), clicked OK and rebooted. After doing this I can still only choose 60hz.

Does anyone have any advice on how I can get this monitor running at 120hz over DVI Dual link?

Cheers!

[ToastyX]

2560x1440 @ 120 Hz normally requires DisplayPort. You can't use dual-link DVI to get 2560x1440 @ 120 Hz unless you use the pixel clock patch, but there's no guarantee the monitor will accept that.

[Wargasm]

(02-23-2016 08:46 PM)ToastyX Wrote:  2560x1440 @ 120 Hz normally requires DisplayPort. You can't use dual-link DVI to get 2560x1440 @ 120 Hz unless you use the pixel clock patch, but there's no guarantee the monitor will accept that.

I've managed to get 144hz @ 1440p over dual link DVI. I ran the pixel clock patcher for AMD cards, then tried CRU again, and was able to go up to 144hz.

Having overdrive back on extreme again feels lovely