Custom Resolution Utility (CRU)

[kurtdh]

(08-07-2024 01:56 PM)ToastyX Wrote:  

(08-07-2024 04:36 AM)kurtdh Wrote:  Ok, I plugged in HDMI 2.1 to the FO32U2P. I set the monitor to 12 bit 240hz 4k. I opened up CRU. I navigated to FO32U2P (active). I clicked import, selected FO32U2P-no-DSC.dat. I clicked OK to exit the program. I clicked restart64. I then ran edid-test followed by edid-dump. Files are attached. Please let me know what your findings are.

Did it have any effect? I'm finding that Windows recognizes the EDID override is there, but NVIDIA's driver seems to ignore it.

(08-07-2024 04:36 AM)kurtdh Wrote:  Secondly: I've been speaking with one of the admins of blurbusters. He owns a XG27AQDMG 240hz 1440p oled monitor. He claims the override in CRU works just fine for him at 1440p 240Hz 10-bit on DisplayPort 1.4. This means he's using DSC, but CRU works just fine for him (that's what he says.) I thought CRU didn't work with DSC, so why is it working for him?

I looked more into it and NVIDIA says this: "NVIDIA DSR, NVIDIA DLDSR and NVIDIA Image Scaling are supported when DSC mode is enabled, if the pixel rate needed to drive the display mode does not exceed the GPU's single head limit. If GPU uses two or more internal heads to drive the display, NVIDIA DSR, NVIDIA DLDSR and NVIDIA Image Scaling are not supported."

That doesn't explain why they need to disable EDID overrides, but it seems tied to this. They don't say what the single head limit is, so I don't know the exact logic that NVIDIA is using to disable EDID overrides and DSR/DLDSR. All I know is everyone with this problem has a monitor with DSC, but apparently it has more to do with the bandwidth required for the highest resolution and refresh rate. Regardless of the cause, the limitation is definitely on NVIDIA's end and not the monitor or CRU.

Did it have any affect on what exactly? After I imported FO32U2P-no-DSC.dat and then used restart64, it didn't change any of my settings. My monitor remained at 240hz 4k 12 bit, and games ran normally. After that, I tried going into CRU and editing the 4k 240hz resolution located in "DisplayID 1.3: 1 data block" in Extension blocks. I changed it to 200hz and used restart64, and it didn't change my monitors resolution to 200hz, so I still can't use CRU, if that's what you're asking.