Custom Resolution Utility (CRU)

[ToastyX]

(Yesterday 05:01 PM)true39 Wrote:  I have an RTX 4090; I was able to remove the resolution on my LG C5 using this same card, but it doesn't work with the G6. I’ve attached a file and would appreciate your help or an explanation of why this is happening. Thanks.

I already explained what's happening:

(Yesterday 01:12 AM)ToastyX Wrote:  That's probably the DSC single-head limit issue mentioned in the first post. Also when that happens, DSR wouldn't be available anyway unless you disable using multiple heads or disable DSC in the TV, which would remove 165 Hz.

Here is the issue in the first post:

NVIDIA and DSC - ToastyX Wrote:NVIDIA's driver currently ignores EDID overrides if Display Stream Compression (DSC) is active and the maximum resolution @ refresh rate combination exceeds the GPU's single-head pixel clock limit:

GTX 1600-series: 1330 MHz
RTX 2000-series: 1330 MHz
RTX 3000-series: 1335 MHz
RTX 4000-series: 1350 MHz
RTX 5000-series: Not affected

Workarounds:

1. SRE can add custom GPU-scaled resolutions but not custom refresh rates: https://www.monitortests.com/forum/Threa...Editor-SRE
2. Use RegEdit to disable using multiple heads, but the pixel clock will be limited to the single-head limit:
   Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\#### (usually 0000)
   Value: "EnableTiledDisplay"=dword:00000000
   

3840x2160 @ 165 Hz is beyond the single-head limit for 4000-series GPUs. The registry workaround will work but it will disable 165 Hz. 144 Hz is still within the limit.

[true39]

(Yesterday 06:53 PM)ToastyX Wrote:  

(Yesterday 05:01 PM)true39 Wrote:  I have an RTX 4090; I was able to remove the resolution on my LG C5 using this same card, but it doesn't work with the G6. I’ve attached a file and would appreciate your help or an explanation of why this is happening. Thanks.

I already explained what's happening:

(Yesterday 01:12 AM)ToastyX Wrote:  That's probably the DSC single-head limit issue mentioned in the first post. Also when that happens, DSR wouldn't be available anyway unless you disable using multiple heads or disable DSC in the TV, which would remove 165 Hz.

Here is the issue in the first post:

NVIDIA and DSC - ToastyX Wrote:NVIDIA's driver currently ignores EDID overrides if Display Stream Compression (DSC) is active and the maximum resolution @ refresh rate combination exceeds the GPU's single-head pixel clock limit:

GTX 1600-series: 1330 MHz
RTX 2000-series: 1330 MHz
RTX 3000-series: 1335 MHz
RTX 4000-series: 1350 MHz
RTX 5000-series: Not affected

Workarounds:

1. SRE can add custom GPU-scaled resolutions but not custom refresh rates: https://www.monitortests.com/forum/Threa...Editor-SRE
2. Use RegEdit to disable using multiple heads, but the pixel clock will be limited to the single-head limit:
   Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\#### (usually 0000)
   Value: "EnableTiledDisplay"=dword:00000000
   

3840x2160 @ 165 Hz is beyond the single-head limit for 4000-series GPUs. The registry workaround will work but it will disable 165 Hz. 144 Hz is still within the limit.

Thanks a lot for the reply—it turns out it's all so complicated. It’s not exactly what you expect when you simply change your TV. =)