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***ToastyX*** · 10-07-2025, 11:03 AM

(10-07-2025 06:38 AM)Winterfalke Wrote: Hi, can someone help me understand this?
I have a 45GX950A monitor running at 5120×2160 and 165 Hz. From what I understand, the pixel clock should be around 1900 MHz before DSC (Display Stream Compression) kicks in. DSC is supposed to activate once the display clock exceeds roughly 1620 MHz, and at that point, NVIDIA’s driver should ignore EDID overrides.

However, EDID overrides for HDR do work for me.

Why does the override still work on an RTX 5090? Is this something unique to the monitor, perhaps related to its dual-mode behavior even when it’s not active, or is there another explanation?

I don't know if the limit applies to 5000-series GPUs. So far nobody with a 5000-series GPU has reported the issue.

Winterfalke · 10-07-2025, 11:25 AM

(10-07-2025 11:03 AM)ToastyX Wrote:
(10-07-2025 06:38 AM)Winterfalke Wrote: Hi, can someone help me understand this?
I have a 45GX950A monitor running at 5120×2160 and 165 Hz. From what I understand, the pixel clock should be around 1900 MHz before DSC (Display Stream Compression) kicks in. DSC is supposed to activate once the display clock exceeds roughly 1620 MHz, and at that point, NVIDIA’s driver should ignore EDID overrides.

However, EDID overrides for HDR do work for me.

Why does the override still work on an RTX 5090? Is this something unique to the monitor, perhaps related to its dual-mode behavior even when it’s not active, or is there another explanation?
I don't know if the limit applies to 5000-series GPUs. So far nobody with a 5000-series GPU has reported the issue.

Thank you for the quick reply. That would explain a few things, since on the same monitor CRU worked for some people but not for others. From what I can tell, the latter had 40-series GPUs.

wrathloki · (Last edited: 10-08-2025, 09:07 AM by wrathloki)

So I’m stupid and don’t understand the calculations, so can somebody please tell me what the max luminance, max frame-avg, and min luminance settings would be for a 1121 nits display?

***ToastyX*** · 10-08-2025, 02:50 PM

(10-08-2025 09:03 AM)wrathloki Wrote: So I’m stupid and don’t understand the calculations, so can somebody please tell me what the max luminance, max frame-avg, and min luminance settings would be for a 1121 nits display?

Right now CRU only shows the raw values. I will be adding a calculator in the next major release. 1121 cd/m² would be 144 raw for max luminance. The other fields are optional.

wrathloki · 10-08-2025, 06:14 PM

(10-08-2025 02:50 PM)ToastyX Wrote:
(10-08-2025 09:03 AM)wrathloki Wrote: So I’m stupid and don’t understand the calculations, so can somebody please tell me what the max luminance, max frame-avg, and min luminance settings would be for a 1121 nits display?
Right now CRU only shows the raw values. I will be adding a calculator in the next major release. 1121 cd/m² would be 144 raw for max luminance. The other fields are optional.

Awesome, thank you. A calculator sounds like a very useful feature.

tombom · (Last edited: 10-10-2025, 07:08 AM by tombom)

Hello
i am trying to change my S95F's VRR range because it is flickering considerably

However, when i go to "Extension Block -> HDMI 2.1 Support -> Variable Refresh Rate" I cannot increase the lower limit (the number turns red and i cannot click "ok"), I can only decrease it.

this is on a 5070ti. I can add custom refresh rates so EDID overrides do not seem to be ignored on this GPU (Samsung's stupid one connect box has DSC activated and the ports are only 40gbps).

any (other) ideas on how to decrease VRR Flicker would be much appreciated. The VRR flicker is driving me crazy on this otherwise awesome TV Sad

***ToastyX*** · 10-12-2025, 12:14 AM

(10-10-2025 07:08 AM)tombom Wrote: Hello
i am trying to change my S95F's VRR range because it is flickering considerably

However, when i go to "Extension Block -> HDMI 2.1 Support -> Variable Refresh Rate" I cannot increase the lower limit (the number turns red and i cannot click "ok"), I can only decrease it.

this is on a 5070ti. I can add custom refresh rates so EDID overrides do not seem to be ignored on this GPU (Samsung's stupid one connect box has DSC activated and the ports are only 40gbps).

any (other) ideas on how to decrease VRR Flicker would be much appreciated. The VRR flicker is driving me crazy on this otherwise awesome TV

HDMI only supports up to 48 Hz for the minimum refresh rate. Honestly the best option would be to avoid using VRR if the flicker is that bad.

PearlSTG · (Last edited: Yesterday, 02:29 AM by PearlSTG)

Good day everyone,
I am using a Samsung Syncmaster 955DF- on a PC running a RTX 5060 and Ryzen 7 7700. using a VGA to DP adapter

No matter what I try, I cannot get native 640x480 running on this CRT. Sometimes, I can get it running but with an active signal of 1280x960, otherwise it's just a black screen- regardless of the refresh rate.

I've been at this for hours and going to tear my hair out, if anyone has ideas please let me know.

Frets2025 · Yesterday, 04:39 PM

I absolutely love this utility. It has given me hours of enjoyment with several games. However a problem has risen. I recent upgraded from a RTX3060 to a RTX4070 TI Super. I can copy and paste the monitor parameters to make the monitors to where I can get 1440p in Nvidia surround. But now when I run restart or restart64, my machine locks up. I’ve even tried older drivers to no avail. My 3 different monitors are 2k monitors. It worked beautifully with the 3060, but now with the upgrade it won’t. Any thoughts to point me in the right direction would be greatly appreciated.

***ToastyX*** · Today, 01:00 AM

(Yesterday 04:39 PM)Frets2025 Wrote: I absolutely love this utility. It has given me hours of enjoyment with several games. However a problem has risen. I recent upgraded from a RTX3060 to a RTX4070 TI Super. I can copy and paste the monitor parameters to make the monitors to where I can get 1440p in Nvidia surround. But now when I run restart or restart64, my machine locks up. I’ve even tried older drivers to no avail. My 3 different monitors are 2k monitors. It worked beautifully with the 3060, but now with the upgrade it won’t. Any thoughts to point me in the right direction would be greatly appreciated.

If the system locks up when restarting the graphics driver, then that's a bug in NVIDIA's driver. What happens if you reboot instead? Does it lock up during boot? What happens if you disconnect two monitors so there's only one monitor connected, then reboot or restart, and then reconnect the two monitors afterwards?