Custom Resolution Utility (CRU)

[fake42]

(01-24-2025 03:28 AM)ToastyX Wrote:  

(01-23-2025 10:43 PM)fake42 Wrote:  With disabled DSC 2560x1440@330Hz - should not work. But it works! Why?

Why should it not work? 48 Gbps has an effective data rate of around 42.6 Gbps, which is enough for around 1420 MHz pixel clock at 10 bpc. I don't know the exact limit since I can't test it, but NVIDIA GPUs are limited to around 1350 MHz anyway, which is still enough for 330 Hz.

Thank you for reply.
I used this calculator for bandwidth.
   
It says 2560x1440@330Hz 10bit is 44.38Gbit/s, which is more than HDMI 2.1 42.67Gbit/s Maximum Data Rate.
Bad calculator?

[creo_gen]

Hi. My new monitor has 3440x1440 and up to 170 Hz. Connected via DP to RX 580. I saw that video memory is on max speed always. Few recipes showed a way to use CRU, add new detailed resolution. However, I stuck on changing refresh rate to 144 Hz (actually, any value that is more of about 90 Hz). It is marked red and disallow to save changes for Automatic CRT timing.

So, i plan to set actual resolution and refresh rate to 144 Hz to have video memory not on max freq.

I have up to date Radeon drivers 24.9.1 for my RX 580, connection via DP and currently set 144 Hz refresh rate. On screen 1 you can see added resolution with 120 Hz, is was added in Manual Timing and actually didn't help with memory max speed issue.

Any suggestions? Should I go for AMD/ATI Pixel Clock Patcher? Thanks.




UPD. AMD/ATI Pixel Clock Patcher didn't help.

[ToastyX]

(01-24-2025 02:19 PM)creo_gen Wrote:  Hi. My new monitor has 3440x1440 and up to 170 Hz. Connected via DP to RX 580. I saw that video memory is on max speed always. Few recipes showed a way to use CRU, add new detailed resolution. However, I stuck on changing refresh rate to 144 Hz (actually, any value that is more of about 90 Hz). It is marked red and disallow to save changes for Automatic CRT timing.

So, i plan to set actual resolution and refresh rate to 144 Hz to have video memory not on max freq.

I have up to date Radeon drivers 24.9.1 for my RX 580, connection via DP and currently set 144 Hz refresh rate. On screen 1 you can see added resolution with 120 Hz, is was added in Manual Timing and actually didn't help with memory max speed issue.

Any suggestions? Should I go for AMD/ATI Pixel Clock Patcher? Thanks.

Please read the first post. It explains why the number turns red. You should be editing 144 Hz in the existing DisplayID extension block. Also don't use "Automatic CRT" with non-CRT monitors because that will use too much bandwidth. "Automatic PC" should be enough, but 144 Hz should already have enough vertical blanking by default for the video memory to clock down. Do you have multiple monitors? The video memory won't clock down if all the monitors aren't perfectly synchronized, so if they are different resolutions and refresh rates, that won't work. Do not use the patcher.

[ToastyX]

(01-24-2025 01:23 PM)fake42 Wrote:  Thank you for reply.
I used this calculator for bandwidth.

It says 2560x1440@330Hz 10bit is 44.38Gbit/s, which is more than HDMI 2.1 42.67Gbit/s Maximum Data Rate.
Bad calculator?

It's correct for CVT-RB2 timing, but you used one of the native timings, which has less vertical blanking. Anything under 1350 MHz pixel clock should work.

[ToastyX]

(01-24-2025 06:06 AM)gaoyanan Wrote:  // todo: if (RedoSlotCount == MaxSlotCount) || (RedoDataSize == MaxDataSize) , Out of range
// todo: if (UndoSlotCount == MaxSlotCount) || (UndoDataSize == MaxDataSize) , Out of range
// todo: not build buffer,Out of range
// delete[] SlotData;
//SlotData = new unsigned char[MaxSize];

Your assessment of the code is incorrect. The SlotCount and DataSize variables are not used as indexes, so they would not be out of range. The max possible buffer is allocated when the list is first created, so it would never be out of range and does not need to be reallocated. The max size is never more than the max possible size. Also the entire codebase is being rewritten for CRU 2.0, so the new code will be completely different.

[creo_gen]

(01-24-2025 03:04 PM)ToastyX Wrote:  Please read the first post. It explains why the number turns red. You should be editing 144 Hz in the existing DisplayID extension block. Also don't use "Automatic CRT" with non-CRT monitors because that will use too much bandwidth. "Automatic PC" should be enough, but 144 Hz should already have enough vertical blanking by default for the video memory to clock down. Do you have multiple monitors? The video memory won't clock down if all the monitors aren't perfectly synchronized, so if they are different resolutions and refresh rates, that won't work. Do not use the patcher.

Thx for prompt reply. I have only 1 monitor, so it is not the case. I checked DisplayID extension block before and it has necessary resolutions (attached).



Changing to "Automatic PC" in the Detailed resolution block allowed to top Refresh rate to about 119Hz but not more, again red value from 120 Hz or more.

So, if i get you right i need to edit the given 143.999 Hz resolution in DisplayID block. Set it to "Automatic PC" from Manual.
Which one to change as i have dropdown menu with at least DisplayId 1.3 and DisplayId 2.0?



Is that correct way to do so? on the picture below.




UPD. did it in DisplayId 1.3 block, changed type to "Automatic PC" for entry of 143.999 Hz. And it worked for me. Should i prioritize it somehow except making it #1 in the list (as it actually was before)?

[ToastyX]

(01-24-2025 03:36 PM)creo_gen Wrote:  Thx for prompt reply. I have only 1 monitor, so it is not the case. I checked DisplayID extension block before and it has necessary resolutions (attached).



Changing to "Automatic PC" in the Detailed resolution block allowed to top Refresh rate to about 119Hz but not more, again red value from 120 Hz or more.

So, if i get you right i need to edit the given 143.999 Hz resolution in DisplayID block. Set it to "Automatic PC" from Manual.
Which one to change as i have dropdown menu with at least DisplayId 1.3 and DisplayId 2.0?

Yes, that should work. You can also try that with 165 and 170 Hz since there is enough bandwidth, but I don't know if the monitor will accept it. Don't change the DisplayID version. For 120 Hz, you can delete the existing one, add a new extension block, set the type to DisplayID 1.3, add a detailed resolutions data block, and add 120 Hz in there.

[creo_gen]

(01-24-2025 03:47 PM)ToastyX Wrote:  Yes, that should work. You can also try that with 165 and 170 Hz since there is enough bandwidth, but I don't know if the monitor will accept it. Don't change the DisplayID version. For 120 Hz, you can delete the existing one, add a new extension block, set the type to DisplayID 1.3, add a detailed resolutions data block, and add 120 Hz in there.

Thank you very much, your replies help me much. Sounds great for another options. I'm fine with 144 Hz mode, Win10 allows to pick 10 bit colors on that rate.

For 120 Hz entry. It is in the upper block and Win10 sees it and allows me to choose this refresh rate from that moment.

If I properly read the 1st post, then i can change in the existing DisplayId block resolution with 120 Hz. It is 2560x1440 120 Hz -> 3440x1440 120 Hz. So i expect lower resolution should also be present in 120 Hz. Or you mean the same? I thought it was about the very 1st Detailed resolution block where i added 120 Hz entry by myself before.



Another question about HDMI connection. It is declared HDMI 2.1 for the TCL monitor. However, connection via HDMI cable (everything else is same) gives only 100 Hz. I changed another cable which should be fine with HDMI 2.1 but no changes. Maybe there are tunings to allow higher refresh rates via HDMI? Where to check it?

[chris89]

@ToastyX Hello. May you advise on a discussion on Github & here on how to dial in the custom resolution on a R9 290 HDMI?
I need a sequence of events that need to take place to get er' done, please?
This is what I have found thus far... However I would love to learn how to achieve greater than 33.75hz @ 3840x2160 on the R9 290 HDMI.

Not to mention RX 5600 XT hdmi, how to get the Virtual Super Resolution res to 5120x2880 on 3840x2160 native, to support RSR Radeon Super Resolution upscale from 3840x2160 to 5120x2880? Right now all I got is 3200x1800 to 3840x2160, even with desktop set to 5120x2880 60?

R9 290 Custom Resolutions
2560x1440 (QHD) 60hz CVT-RB
2736x1536 60hz CVT-RB
2880x1620 55hz CVT-RB
3072x1728 50hz CVT-RB
3200x1800 48hz CVT-RB
3840x2160 33.75hz CVT-RB

CRU
Extension Blocks
Edit - Delete All - Add Detailed Resolutions - Restart64.exe - Done

Thanks

See it says in Detailed Resolutions, 0 slots left? I cannot lose hdmi audio or bitstream. Just wanna dial er' in.
   

[GregB]

(01-24-2025 03:29 AM)ToastyX Wrote:  

(01-21-2025 09:26 PM)GregB Wrote:  I extracted an EDID from a laptop with built in 3D Vision a long time ago.

I have 2 versions of this EDID. One has a much longer block of code, the other, about 1/4 of that.

The long block EDID does not load in Nvidia. The shorter one does. I must have done something years ago to get to the shorter version, but I cannot recall what.

I use this EDID for a ROG Strix XG17AHPE monitor I have. It displays 3D when the EDID is loaded, but I have to tilt the monitor to a little less than 90 degrees to see it more clear, as horizontal, it is too dark.

I have been encountering many problems loading this EDID recently. I don't remember so many problems in the past. My native laptop screen is 120hz QHD 2560x1440 (TN) - AUO B173QTN01.4

The panel which I used to have, and pulled the EDID from is a 17.3" FHD 1920x1080

Sometimes, I encounter a black screen when the EDID is loaded. I reboot, and sometimes it is fixed. Sometimes not. I've spent 6 hour days trying to get it to work, and cannot seem to find out why it sometimes does, and sometimes does not. Re-installing Nvidia Quadro drivers, etc.

Can you post the files here? The black screen on boot is a bug in NVIDIA's driver when using multiple displays (your laptop display + the monitor). See this post for a workaround: https://www.monitortests.com/forum/Threa...wn-scripts

Thanks for the help and linking to the workaround! I'm also going to try out the EDID from the monitor you provided.

The ASUS VG248QG should work if you turn on ELMB and turn off FreeSync in monitor settings. It's been confirmed by some people I know that work with this monitor.

Here's the EDID from a laptop I've been using, in txt format.