Custom Resolution Utility (CRU)

[abso]

Hello everyone,

I'm trying to run my 120hz Monitor (LG 2363D) with my old Laptop. Only way to connect it is by HDMI and the AMD HD5650 GPU inside. I was reading that HDMI cant handle the bandwith of 1080p@120hz so I'm trying to use lower resolutions for ingame use. I used CRU to make 1024x768 resolution @ 120hz which is fine for playing Quake. 120hz worked but i have the problem that the picture is strechted instead of black bars left and right. I activated gpu scaling but it doesnt seem to work. Anyone can help me out? Thanks already in advance.

EDIT:

So I just set at custom resolution 1920x1080@120hz and for some reason it seems to work. Monitor UI shows HDMI 1 - 1920x1080 - 120Hz and ingame it feels really smooth as well compared to when I set it to 60hz. How is this possible? Basically everywhere I was checking I was told it is impossible for various reasons. Anyone can explain why it seems to work?