Custom Resolution Utility (CRU)

[CalinMiclea]

Hi
Hi
I have an AMD RX480 8G graphic card (id harware: PCI\VEN_1002&DEV_67DF&SUBSYS_22D01458&REV_C7)
I use Windows 10, fresh install with latest updates and Radeon software 21.10.2
I'm trying to connect it to an LG TV 65NANO953NA, for an 7680x4320 resolution
I'm connecting through the DisplayPort whitch is v 1.4
I used 3 HDMI 2.1 cables with the next adapters:
1. Lindy 41094
https://www.lindy-international.com/Disp...&ci=200402
DisplayPort 1.4 to HDMI 8K Active Converter - LINDY International Limited<https://www.lindy-international.com/DisplayPort-1-4-to-HDMI-8K-Active-Converter.htm?websale8=ld0101.ld021102&pi=41094&ci=200402>
2. https://www.amazon.de/-/en/gp/product/B0...UTF8&psc=1
3. https://www.amazon.de/-/en/gp/product/B0...UTF8&psc=1 (this one with an DP 1.4 cable - https://www.amazon.de/-/en/gp/product/B0...UTF8&psc=1)
I tried also this cable https://www.amazon.de/-/en/gp/product/B0...UTF8&psc=1
I have selected 29,970 refresh rate
But I cannot get any resolution higher than 3840x2160
I'm not able to create a custom resoultion of 7680x4320
On the TV I selected 8k resolution as well
I contacted AMD customer service ant they redirected me to the producer of the graphic card. The last message was to try another monitor, like the 8k monitors are hanging in trees
I tried CRU, I patched the graphic card with your amd patch, reset, and restart64
but I still donțt get the 7680p
What should I do to get 7680x4320 resolution as all the devices that I used are advertised that support this resolution?
Thank you

[ToastyX]

(02-16-2022 06:30 PM)CalinMiclea Wrote:  I have selected 29,970 refresh rate
But I cannot get any resolution higher than 3840x2160
I'm not able to create a custom resoultion of 7680x4320
On the TV I selected 8k resolution as well
I contacted AMD customer service ant they redirected me to the producer of the graphic card. The last message was to try another monitor, like the 8k monitors are hanging in trees
I tried CRU, I patched the graphic card with your amd patch, reset, and restart64
but I still donțt get the 7680p
What should I do to get 7680x4320 resolution as all the devices that I used are advertised that support this resolution?

DisplayPort 1.4 is limited to 1080 MHz pixel clock at 8 bpc and 1440 MHz pixel clock at 6 bpc. Anything higher requires Display Stream Compression (DSC), which the RX 480 doesn't support. In theory, setting the pixel format in the Radeon software to YCbCr 4:2:2 should allow 30 Hz to work, but I'm not sure how that translates when using active adapters. For YCbCr/RGB 4:4:4, the CTA-861 timing for 7680x4320 @ 30 Hz is 1188 MHz, so you would need to reduce that. "Automatic (PC)" will bring it down to 1030.42 MHz. Do not use the patcher. You will have to add a DisplayID extension block to add a custom 7680x4320 resolution.

[CalinMiclea]

Thanks. I'll try it tomorrow. One last question: should I replace the RX480 with RX 6600 XT?

[/quote]
DisplayPort 1.4 is limited to 1080 MHz pixel clock at 8 bpc and 1440 MHz pixel clock at 6 bpc. Anything higher requires Display Stream Compression (DSC), which the RX 480 doesn't support. In theory, setting the pixel format in the Radeon software to YCbCr 4:2:2 should allow 30 Hz to work, but I'm not sure how that translates when using active adapters. For YCbCr/RGB 4:4:4, the CTA-861 timing for 7680x4320 @ 30 Hz is 1188 MHz, so you would need to reduce that. "Automatic (PC)" will bring it down to 1030.42 MHz. Do not use the patcher. You will have to add a DisplayID extension block to add a custom 7680x4320 resolution.
[/quote]

[ToastyX]

(02-16-2022 07:00 PM)CalinMiclea Wrote:  Thanks. I'll try it tomorrow. One last question: should I replace the RX480 with RX 6600 XT?

The RX 6600 XT supports HDMI 2.1, which will allow you to use HDMI directly and get 8K @ 60 Hz.

[kokok]

Hello All.

Have problem set resolution 1920x1200 by 120hz
or 1920x1080 by 120hz

i have next
1. projector viewsonic ls850wu
2. pc witch ATI hd6850
3. hdmi-hdmi 2.0 cable 5m

the small resolution is work by 120hz but in big not work only maximum work on 75hz

can you help me ?

Thanks a lot.

[ToastyX]

(02-17-2022 02:39 PM)Dreamic Wrote:  Simply reverting the Device ID back to SAM105C and changing nothing else will raise GSync Range and thus where LFC kicks in. I don't know why this is happening, if it's some new restriction by Nvidia or Windows, or why I found no mention of this as a possible problem or solution anywhere. Also don't know if there's any downsides to using another Device ID, but it seems to be the only way for me to actually change my GSync Range now for some reason.

NVIDIA must have hard-coded limits for certain monitors in the driver.

[angelo16]

(11-28-2021 09:38 PM)Sperious Wrote:  

(11-28-2021 03:02 PM)ToastyX Wrote:  

(11-28-2021 11:22 AM)Sperious Wrote:  I don’t understand how I am supposed to access any potential second extension block containing additional detailed resolutions? I have tried deleting the greyed out “Default Extension Block” and restarted using Restart64 but that didn’t change anything. I have tried adding another one manually but it isn’t populated with any new data.

Am i supposed to add a new detailed resolution under the DisplayID section of my newly created Extension Block?

Like it says, the second extension block is usually a DisplayID extension block, but CRU can't read it, so it appears as a default extension block, and because of an NVIDIA driver bug, you will have to delete the default extension block and add a DisplayID extension block manually (use DisplayID 1.3). Then you have to add 3440x1440 @ 144 Hz in the DisplayID extension block.

(11-28-2021 11:22 AM)Sperious Wrote:  I’m not sure how to confirm if there are at least 2 bytes left for data blocks in order for my Nvidia card to not ignore the changes I make?

Your screenshot shows 11 bytes left. If after fixing the extension blocks the range still won't change, try adding a FreeSync data block in the CTA-861 extension block. That's only 9 bytes, so that should leave 2 bytes left.

Thank you so much for taking the time to clarify this for me! It’s working beautifully now. You made my day. Thank you!

Hi,

I have the same monitor, same problem, and same goal. I tried to follow this but always ending up in recovery mode when applying the setting. I'm not much an expert in using this utility. It will much appreciated if you can share screenshots of the following for my reference:
- Adding of 3440x1440@144Hz in the DisplayID block extension (there are so many options to choose from and I don't know what actual values to select/enter)
- Values entered in the added Freesync data.

Thank you very much in advance!

[UserAa]

Hey,

Thank you very much for the tool. I really like it. However, I'd like to add more digits when choosing the refresh rate. It's now set to 75 hz now but I want to change to 75.01000001011011010110010101101110, which is 28 digits, for personal reasons. Is there a way to modify the program in such a way it allows for unrestricted use of decimals? I tried opening the exe in visual studio but I cannot figure out what to do. Thanks in advance.

[ToastyX]

(02-20-2022 09:00 PM)UserAa Wrote:  Thank you very much for the tool. I really like it. However, I'd like to add more digits when choosing the refresh rate. It's now set to 75 hz now but I want to change to 75.01000001011011010110010101101110, which is 28 digits, for personal reasons. Is there a way to modify the program in such a way it allows for unrestricted use of decimals? I tried opening the exe in visual studio but I cannot figure out what to do. Thanks in advance.

What you're asking for is impossible. The actual refresh rate is calculated from the pixel clock, which can only be specified with 2 decimal places (or 3 with DisplayID 2.0). Allowing more decimals in the refresh rate would not change the actual refresh rate because CRU rounds up to the next possible pixel clock value.

[Michael Z Freeman]

Hi, still using CRU. Some games for some reason select the lowest frequency which is 24hz on my 4K TV. I've tried making 60hz the minimum in the "range" at the top of the CRU window. I also removed all resolutions with a frequency below 60hz. However the 24hz minimum is STILL shown by Windows. Where is it coming from ? I'm pretty sure its not in the EDID anymore so my guess is that AMD (or Windows) is automatically adding it. Is there any way of stopping this ? Cheers.