Custom Resolution Utility (CRU)

[ToastyX]

(05-18-2022 10:07 PM)hellohell Wrote:  I will try to add an extension block with the resolution I want, is the only thing I haven't tried yet. I believe the dolby block is vendor specific audio.Will this tool change the edid permanently? If something goes wrong and if i want to go back to the original edid is it possible? Thanks. I should have asked before I started using it but I'm just curious.

Changes are not permanent and are done through software only. You can run reset-all.exe and reboot to restore the original EDID.

[ToastyX]

(05-18-2022 06:17 AM)cluelessguy Wrote:  Yes it does support forum VRR. Can I edit something in the EDID so I can force it?

The VRR range is defined in the HDMI 2.x data block. If the TV supports HDMI VRR, it should already have a range defined, so something is not supporting the conversion.

[cluelessguy]

(05-19-2022 01:47 AM)ToastyX Wrote:  

(05-18-2022 06:17 AM)cluelessguy Wrote:  Yes it does support forum VRR. Can I edit something in the EDID so I can force it?

The VRR range is defined in the HDMI 2.x data block. If the TV supports HDMI VRR, it should already have a range defined, so something is not supporting the conversion.

This is what I'm using for DP alt mode conversion. Could this be the culprit?

[dutch45612]

Hello friends, first thanks you very much for your software, I used it a lot with my last laptop and really liked it! * Sorry about my English by the way.

Please tell me, what i am trying to achieve this time with another internal display(without success) would be to lower the screen refresh rate to let's say 45, or 30 maybe, it is stucked at 60 by default - marked as digital flat panel in the device manager.

Well i tried a couple of combination of supported resolutions with the lower refresh rate i would like to achieve, rebooted/ restart64.exe numerous times without any success in making it selectable/showed up in the monitor graphic properties. I played with it since a week now and i told me maybe someone with more knowledge in that spectrum could put me on the right track ?

There are many option in that software that i don't really know about and maybe there is something i overlooked that could makes the thing works for me... I would be really grateful if someone could give me a clue, any piece of info would be welcome .

The device is a GPD WIN 3, with an integrated Intel Iris graphic and a "digital flat panel" by the device manager drivers...

Any help is more than appreciated, thanks you very much!

[ROYER_XIV]

Hello,
I recently encountered problems with my AMD card, this story of VRAM frequency too high while idle.
That led me here, and to the discovery of CRU.
However, I have two questions:
- the maximum pixel clock of my monitor is 330. If I choose CVT-RB, I get 346. If I choose CVT-RB2, I get 332.
Is it better to choose CVT-RB2, and block the pixel clock at 330 (and thus go from 144hz to 142hz) or to choose CVT-RB, even though the pixel clock exceeds that of my monitor?

- Can changing all this cause changes in the display? I know that if we switch to CVT-RB via the AMD software, the colors are degraded for example.

Thanks for your attention, and for your work.

[ToastyX]

(05-19-2022 04:03 AM)cluelessguy Wrote:  This is what I'm using for DP alt mode conversion. Could this be the culprit?

I don't know the capabilities of that chip. I saw a reply on reddit that says the Synaptics VMM7100 doesn't support VRR. Parade supposedly has a chip that does VRR (PS 196), but I don't know what uses it.

[ToastyX]

(05-19-2022 01:05 PM)dutch45612 Wrote:  There are many option in that software that i don't really know about and maybe there is something i overlooked that could makes the thing works for me... I would be really grateful if someone could give me a clue, any piece of info would be welcome .

The device is a GPD WIN 3, with an integrated Intel Iris graphic and a "digital flat panel" by the device manager drivers...

Intel's driver does not allow custom resolutions or EDID overrides with some internal displays.

[ToastyX]

(05-19-2022 04:59 PM)ROYER_XIV Wrote:  I recently encountered problems with my AMD card, this story of VRAM frequency too high while idle.
That led me here, and to the discovery of CRU.
However, I have two questions:
- the maximum pixel clock of my monitor is 330. If I choose CVT-RB, I get 346. If I choose CVT-RB2, I get 332.
Is it better to choose CVT-RB2, and block the pixel clock at 330 (and thus go from 144hz to 142hz) or to choose CVT-RB, even though the pixel clock exceeds that of my monitor?

- Can changing all this cause changes in the display? I know that if we switch to CVT-RB via the AMD software, the colors are degraded for example.

You're leaving out a lot of information. What video card? What monitor? What connection: DVI, HDMI, DisplayPort? What resolution? I'm assuming 1920x1080. How are you determining the maximum pixel clock? The timing parameters should not affect the visible image. How are the colors degraded?

[ROYER_XIV]

(05-19-2022 09:30 PM)ToastyX Wrote:  

(05-19-2022 04:59 PM)ROYER_XIV Wrote:  I recently encountered problems with my AMD card, this story of VRAM frequency too high while idle.
That led me here, and to the discovery of CRU.
However, I have two questions:
- the maximum pixel clock of my monitor is 330. If I choose CVT-RB, I get 346. If I choose CVT-RB2, I get 332.
Is it better to choose CVT-RB2, and block the pixel clock at 330 (and thus go from 144hz to 142hz) or to choose CVT-RB, even though the pixel clock exceeds that of my monitor?

- Can changing all this cause changes in the display? I know that if we switch to CVT-RB via the AMD software, the colors are degraded for example.

You're leaving out a lot of information. What video card? What monitor? What connection: DVI, HDMI, DisplayPort? What resolution? I'm assuming 1920x1080. How are you determining the maximum pixel clock? The timing parameters should not affect the visible image. How are the colors degraded?

I have a rx6800, 144hz 1080p monitor ( AOC 24G2U, displayport) and 60hz 1080p monitor (BenQ GW2480, hdmi).
I saw the maximum pixel clock of my monitor in CRU, where you can check the monitors informations.
I tested both cvt-rb and cvt-rb2, and both of them make the VRAM frequency go down to an acceptable level.
My question is: is it better to choose CVT-RB, and exceed the pixel clock of my monitor, or CVT-RB2 which is almost the same pixel clock of my monitor ?

My monitor pixel clock : 330
CVT-RB pixel clock : 346
CVT-RB2 pixel clock : 332

I can cap the hertz to 142, to stay at 330 pixel clock with CVT-RB2.

The colors are degraded with the AMD software, because it's decreasing from 8 bits to 6 bits, I dont know why.

[ToastyX]

(05-19-2022 10:36 PM)ROYER_XIV Wrote:  I have a rx6800, 144hz 1080p monitor ( AOC 24G2U, displayport) and 60hz 1080p monitor (BenQ GW2480, hdmi).
I saw the maximum pixel clock of my monitor in CRU, where you can check the monitors informations.
I tested both cvt-rb and cvt-rb2, and both of them make the VRAM frequency go down to an acceptable level.
My question is: is it better to choose CVT-RB, and exceed the pixel clock of my monitor, or CVT-RB2 which is almost the same pixel clock of my monitor ?

The limit reported by the monitor is not important. The monitor probably uses DisplayPort HBR mode with 4 lanes, which supports up to 360 MHz pixel clock at 8 bpc, so you can use either CVT-RB or CVT-RB2 at 144 Hz without a problem. If CVT-RB2 works fine, use that. If you exceed 360 MHz, the color depth will automatically drop down to 6 bpc, so if that's happening when using CVT-RB with AMD's software even though the pixel clock should be below that point, then it must be a driver bug.