Custom Resolution Utility (CRU)

[Sperious]

I just bought my first ultrawide monitor, the AOC cu34g2x. I run it at 144Hz together with two 1080p monitors at 144Hz as well. All using DP.

When activating G-Sync on the primary ultrawide I unfortunately get the dreaded flickering when FPS drops, typically during game loading screens and menus. In game it’s mostly fine.

After doing a lot of reading through Google and Reddit, I decided to try to change the adaptive rate range of the monitor from its native 48-144Hz to 80-144Hz.

However, when using CRU, the only “Detailed resolutions” that are reported are 59.972Hz and 99.981Hz. The 144Hz I’m running is not one of the detailed resolutions reported in CRU.



I have tried to press “Edit” and change the V rate anyway, but the flickering persists and my OSD frame counter clearly shows that the monitor dips down to around 48-60Hz those times that the flickering shows.

So, it seems that the changes I make using CRU is not actually implemented. I have run Restart64 and also rebooted several times to no avail.

Another weird thing is that my two identical 1080p monitors show different “Detailed Resolutions” in CRU. One shows only 60Hz while the other one shows 60Hz and 144Hz.





In Nvidia control panel all three monitors are set to 144Hz. In Windows screen settings one of the 1080p monitors is reported running at 144Hz while the other two monitors, including my primary ultrawide, is reported running at 144.001Hz. Could this be the reason that 144Hz is not shown among the detailed resolutions in CRU?

I’m not sure how to make my monitor respect the 80-144Hz range I’m trying to set in CRU, to hopefully get rid of the flickering.