Custom Resolution Utility (CRU)

[qqq]

hello ToastyX ，I use AMD RX5700 and find a very tricky problem when I connect two monitors (2560*1440@60Hz HDMI,3840*2160@60Hz DP).The memory(VRAM) clock will stuck at full speed(1750MHz) thus temperature will increase a lot when idle.This is really annoying.Many people also suffer from this problem for a long time with other AMD card when use 144Hz or more than one monitors.AMD official said they won't fix this in drivers because they don't think it is a problem.
I find the note of CRU(picture below) may solve this problem but I don't know how to do specifically.Could you give me some help?All I find now is the momery clock will auto reduce when I just connect one of them,or set them both 1920*1080@60Hz.
sorry for my poor English,thanks bro.

[ToastyX]

(03-21-2020 04:49 AM)qqq Wrote:  hello ToastyX ，I use AMD RX5700 and find a very tricky problem when I connect two monitors (2560*1440@60Hz HDMI,3840*2160@60Hz DP).The memory(VRAM) clock will stuck at full speed(1750MHz) thus temperature will increase a lot when idle.This is really annoying.Many people also suffer from this problem for a long time with other AMD card when use 144Hz or more than one monitors.AMD official said they won't fix this in drivers because they don't think it is a problem.
I find the note of CRU(picture below) may solve this problem but I don't know how to do specifically.Could you give me some help?All I find now is the momery clock will auto reduce when I just connect one of them,or set them both 1920*1080@60Hz.
sorry for my poor English,thanks bro.

That's normal when using multiple monitors with different resolutions. The memory clock can only change during the blanking period to avoid screen flickering, but if you have two monitors with different resolutions, the blanking periods won't be synchronized, so there's no way to change the memory clock without at least one screen flickering.

The note about vertical blanking/total is a separate issue. If the vertical blanking/total is too low, there won't be enough time to change the memory clock without screen flickering.

[Scriba]

I'm using in some games a non native resolution (1440 x 1080 stretched) on my acer predator xn253qp (G-sync modul and 144hz) for competitive reasons. In the past I was using NCP but on my new monitor G-sync is not working at a non native resolution. A custom resolution in CRU on the other hand works with G-sync.

I was fiddle around yesterday for multiple hours in CRU but didn't find a satisfying custom resolution setting for 1440 x 1080 @ 144hz in CRU which felt smooth.

I would be very grateful if you can help me and share a possible setting for a smooth experience with low input lag. If I need to change something for my VRR in CRU don't hesitate to share it. Because FPS drops felt terrible aswell which shouldn't be the case with a G-sync modul.

Thanks in advance and cheers

[ToastyX]

(03-22-2020 05:45 PM)Scriba Wrote:  I'm using in some games a non native resolution (1440 x 1080 stretched) on my acer predator xn253qp (G-sync modul and 144hz) for competitive reasons. In the past I was using NCP but on my new monitor G-sync is not working at a non native resolution. A custom resolution in CRU on the other hand works with G-sync.

I was fiddle around yesterday for multiple hours in CRU but didn't find a satisfying custom resolution setting for 1440 x 1080 @ 144hz in CRU which felt smooth.

G-SYNC might not work at non-native resolutions, but it should work with GPU scaling.

Instead of using CRU, try editing NV_Modes in the registry: https://www.monitortests.com/forum/Threa...51#pid9851

[Scriba]

(03-22-2020 08:17 PM)ToastyX Wrote:  

(03-22-2020 05:45 PM)Scriba Wrote:  I'm using in some games a non native resolution (1440 x 1080 stretched) on my acer predator xn253qp (G-sync modul and 144hz) for competitive reasons. In the past I was using NCP but on my new monitor G-sync is not working at a non native resolution. A custom resolution in CRU on the other hand works with G-sync.

I was fiddle around yesterday for multiple hours in CRU but didn't find a satisfying custom resolution setting for 1440 x 1080 @ 144hz in CRU which felt smooth.

G-SYNC might not work at non-native resolutions, but it should work with GPU scaling.

Instead of using CRU, try editing NV_Modes in the registry: https://www.monitortests.com/forum/Threa...51#pid9851

Alright thank you!

What I still don't understand is, if I set the refresh rate at 120 or 144hz in CRU, my monitor will always run on 85hz, so I can only switch to 144hz in Nvidia. What I'm doing wrong?

And should I set it to exact 144hz or the number in de extension block (143.97)?

[ToastyX]

(03-23-2020 02:59 PM)Scriba Wrote:  What I still don't understand is, if I set the refresh rate at 120 or 144hz in CRU, my monitor will always run on 85hz, so I can only switch to 144hz in Nvidia. What I'm doing wrong?

I don't know what you mean. It should run at the refresh rate you set it to.

(03-23-2020 02:59 PM)Scriba Wrote:  And should I set it to exact 144hz or the number in de extension block (143.97)?

Doesn't matter.

[Scriba]

(03-23-2020 03:04 PM)ToastyX Wrote:  

(03-23-2020 02:59 PM)Scriba Wrote:  What I still don't understand is, if I set the refresh rate at 120 or 144hz in CRU, my monitor will always run on 85hz, so I can only switch to 144hz in Nvidia. What I'm doing wrong?

I don't know what you mean. It should run at the refresh rate you set it to.

(03-23-2020 02:59 PM)Scriba Wrote:  And should I set it to exact 144hz or the number in de extension block (143.97)?

Doesn't matter.

I try do explain it different. After reseting to default there is only my native resolution 1920 x 1080 in detailed resolutions but with 60hz refresh rate. If I change to 144hz the screen goes black (too much pixel clock).
If I adjust manual or take LCD standart with 144hz my monitor does run only with 85hz.

I got recommend this tool, which I couldn't try out yet:

https://www.monitortests.com/forum/Threa...ck-Patcher

[ToastyX]

(03-23-2020 03:12 PM)Scriba Wrote:  I try do explain it different. After reseting to default there is only my native resolution 1920 x 1080 in detailed resolutions but with 60hz refresh rate. If I change to 144hz the screen goes black (too much pixel clock).
If I adjust manual or take LCD standart with 144hz my monitor does run only with 85hz.

If your monitor can do 144 Hz, then it should already exist in the extension block. I don't see why you would be limited to 85 Hz. Export a file and post it here so I can see what you did.

[sparkles38]

Hi guys. I'm in trouble with Freesync 2 HDR(It's grayed out in games). After i use cru there is no more 12 bpc color depth option in radeon settings. Only have 6,8,10. I tried to change pixel format to Full rgb, yCbCr but it didnt showing up. I only changed refresh rate 144 to 143 in cru for might be solve flickering problem but didn't work.

My monitor 27Samsung chg70.

I did ''reset all'' but no luck. update graphic driver, DDU still nothing changed.

Btw, does anyone know what this monitor's standart mode freesync range is ? Mine is 120-144 but ultimate 48-144. I dont know if it changed after messing up with this program.

Is there anyway to return factory settings?

[ToastyX]

(03-24-2020 11:28 PM)sparkles38 Wrote:  I did ''reset all'' but no luck. update graphic driver, DDU still nothing changed.

Btw, does anyone know what this monitor's standart mode freesync range is ? Mine is 120-144 but ultimate 48-144. I dont know if it changed after messing up with this program.

Is there anyway to return factory settings?

Running reset-all.exe and rebooting returns all monitors to factory settings, and so does using DDU, so there shouldn't be anything left over. CRU doesn't change anything on the monitor itself.