Custom Resolution Utility (CRU)

[lblando]

Hello, I am a new user and trying to get CRU to work. I have an 49LGNANO85UNA, which supports 120hz in 1440p and 1080p, and my objective is to get it recognized by Windows as such, and driven in 2560x1440@120Hz, so I can play racing games. The graphics card is an Nvidia RTX 3080. The monitor is connected via a Displayport to HDMI cable.

I was able to get the monitors to 2560x1440, but at a lower frequency (60Hz). It seems that the only resolutions that (in the default Windows/NVIDIA) configuration go up to 120Hz are those 1080p (e.g. 1920x1080). I have checked the TV specs, and several benchmarks and they do mention that the TV supports 120Hz in 1440p resolution, which is what I want to achieve. So, problem #1 is getting the TV to 2560x1440@120Hz.

After trying various iterations with CRU, without success. I decided to go as minimalistic as possible, to see if I could debug the problem. I used CRU to get to the following configuration:

• 2560x1440 @ 120Hz (483.40Mhz) listed as the *only* "Detailed Resolution"
• No "Standard Resolutions" (I deleted them all)
• In the CEA-861 Extension Block:
  • Deleted all "TV resolutions"
  • Within "HDMI Support" I deleted all the "HDMI resolutions"
  • In "4:2:0 resolutions" I deleted them all as well.
    

Needless to say, it did not work. After rebooting the computer, the monitor defaulted to 1024x768 with only 800x600 as an alternative resolution.

I then did the same setup as above, but tried it as "LCD - standard" (instead of the "LCD - native" I had used the first time). Same results.

Then, I tried to add 2560x1440/120Hz as a "standard resolution" but it is not listed in the drop-down menu. What is more, when you try "Custom Resolution" and enter the values 2560, 1440, and 120hz, the first two are in red and of course CRU does not let you create such a resolution.

Finally, I tried to create this resolution within the "HDMI Support" part of the "CEA-861" extension block, but in such a case it asks me for "code" for the resolution and I have no idea which code to use for 2560x1440/120Hz.

Apologies for the length of this email. Any/all advice is appreciated.

Thanks
Luis