Custom Resolution Utility (CRU)

[ToastyX]

(01-02-2020 02:24 AM)ExBaTri Wrote:  I found this place and the CRU tool because of an old thread on Reddit. I was searching for a solution for the high idle speeds on my RTX2070 when using a multi monitor setup.

On my previous computer, running Windows 7 with a 1070, I had the same problem. There I was able to "solve" the problem simply by reducing the refresh rate from 144Hz to 120Hz.

On my new computer running Windows 10 and a new RTX 2070 Super this no longer works. No matter which refresh rates I choose, and no matter which combination of refresh rates I choose, the idle speed of the card sticks to 1600Mhz. The only thing that helps so far is using the 3rd Party tool nVidia Inspector.

Unfortunately ppl still recommenc the "solution" that worked on Windows 7 but as I said this is no longer the case. So I was pretty excited when I found this thread on reddit.

He wrote that, although Windows 10 shows the same refresh rate for both displays it actually isn't the same internally and that prevent the card from going to idle. He was able to solve it by creating a custom profile using CRU and applying it to both monitors so they both us the excact same refresh rates.

I tried to read everything, even all the CRT, HDMI and old stuff that doesn't apply to me, and worked myself up to page 264 but I'm lost. All the tools I know, nVidia Inspector, GPU-Z and so on do indeed show the same values for both monitors. And, while I was able to create a profile in CRU, I created one on both monitors for 120Hz, I fail do see where I can change to said profile. The monitor options of Windows 10 as well as the nVdia panel still only show the "normal" 120Hz as well as the other refresh rates? Do I have to delete the standard ones?

Am I stupid? What I'm doing wrong?

Windows can only list one 120 Hz refresh rate, so the one that's listed first takes precedence. You should edit the existing one in the extension block instead of adding a new one, but if you have two of the same monitor, then they should be the same already.

The problem you had on your other computer with Windows 7 is a different problem. If the vertical blanking is too low, the GPU won't have enough time to reduce the memory clock and retrain the memory when idle without screen corruption, and the vertical blanking was probably reduced at 144 Hz to fit within pixel clock limits, so setting 120 Hz worked around that problem. Increasing the vertical blanking for 144 Hz would fix that problem.

The problem other people are describing with Windows 10 is also a different problem. If you have two monitors with different timing parameters, the vertical blanking periods won't be synchronized, so there won't be time to reduce the memory clock without affecting one of the monitors. In that case, using CRU to make sure the timing parameters are the same will fix that problem.

Your problem sounds like a driver bug. If the timing parameters are the same already, then there shouldn't be any issues with clocking down when idle at 120 Hz. You can try increasing the vertical blanking for both monitors at 120 Hz and see if that makes a difference, but in reality, you shouldn't have to do anything special to make this work with two identical monitors.

[ExBaTri]

Thanks for your answer. And thank you for trying to help me.

I haven't had a change to do further testing today. And I'm not sure how and/or were to increase vertical blanking yet but I will figure it out.

Is vertical blanking automatically increased the lower the refresh rate is set to? Cause the high idle speed is present even at 60/60Hz. Needless to say it's also there at 100/100, 120/120, 144/144 and ever combination of higher and lower refresh rates. And I think I tested them all.

What really kills me is that the release notes of nVidia's driver version 416.81 from November 2018 list "[Turing GPU]: Multi-monitor idle power draw is very high. [2400161]" as fixed issue. Unfortunately the Super cards were not yet supported by that driver release.

[ToastyX]

(01-02-2020 10:54 PM)ExBaTri Wrote:  Is vertical blanking automatically increased the lower the refresh rate is set to? Cause the high idle speed is present even at 60/60Hz. Needless to say it's also there at 100/100, 120/120, 144/144 and ever combination of higher and lower refresh rates. And I think I tested them all.

It's the opposite. Vertical blanking is lower at lower refresh rates because the data is being sent slower at lower refresh rates. The vertical blanking needs to be increased at higher refresh rates to keep the same amount of time. Standard timing parameters should already account for this. The fact that it still happens at 60 Hz tells me this is a driver issue and not an issue with the timing parameters.

[ExBaTri]

Thank you very much for the help and explanation

[ExBaTri]

I just want to let you know that I solved the problem thanks to your hint with the buggy driver. After saying goodbye to the 44x branch, and by installing 436.48 instead, idle speeds are fine.

This has nothing to do with CRU but maybe some ppl like me, with the same problem, come here looking for help.

And thank you once again.

[Hitsuji007]

Hello,

when i open CRU and try to edit my monitors (extension blocks), i dont have the option for TV-Resolution (only audio formats and speaker setup is shown), and when i try to add my resolution manually i dont have the resolution as an option.

I have two 2560x1440 and one 3440x1440 monitors.
Asus PG348q and AsusPG27VQ

I got a GTX1080 and use 3 DisplayPorts.

I hope you can help me.

[alphamooncamp]

(11-25-2019 02:11 PM)ToastyX Wrote:  

(11-25-2019 05:53 AM)alphamooncamp Wrote:  Can a CRU solve, overwrite the resolution of the Gigabyte Graphics Card in HDMI to 2560x1080 to fill the whole screen?

If the monitor already defines 2560x1080, then no, unless you reduce the refresh rate to 50 Hz.

Thank you very much for your help, succeeded!

[ToastyX]

(01-04-2020 06:40 PM)Hitsuji007 Wrote:  when i open CRU and try to edit my monitors (extension blocks), i dont have the option for TV-Resolution (only audio formats and speaker setup is shown), and when i try to add my resolution manually i dont have the resolution as an option.

I have two 2560x1440 and one 3440x1440 monitors.
Asus PG348q and AsusPG27VQ

That means the monitors don't define any TV resolutions. You can add TV resolutions manually, but 2560x1440 and 3440x1440 aren't TV resolutions. You would need to use detailed resolutions for non-TV resolutions.

[Hitsuji007]

[/quote]
That means the monitors don't define any TV resolutions. You can add TV resolutions manually, but 2560x1440 and 3440x1440 aren't TV resolutions. You would need to use detailed resolutions for non-TV resolutions.
[/quote]

Ok thx a lot for answer. So it is possible to get CRU to my priorisied setting? In all 8560x1440?

I dont know how, though.

[ToastyX]

(01-04-2020 11:44 PM)Hitsuji007 Wrote:  Ok thx a lot for answer. So it is possible to get CRU to my priorisied setting? In all 8560x1440?

I dont know how, though.

I don't know what you're asking. CRU only deals with individual monitors. You need to use AMD Eyefinity or NVIDIA Surround to combine displays.