Custom Resolution Utility (CRU)

[actarusfleed]

(03-29-2019 09:02 PM)ToastyX Wrote:  

(03-27-2019 10:52 PM)actarusfleed Wrote:  So what I've to set to have perfect 23,976 Hz??

Hardware clocks are not guaranteed to be perfect. You would have to figure out how much the hardware clock is off by and adjust the refresh rate to make up the difference. You can adjust the timing parameters to nudge the refresh rate slightly lower. This calculates the totals needed to get a specific refresh rate: https://www.monitortests.com/pixelclock....=24&rate=1

Hi , It's not completely clear to me how to use the tool you linked to me ...

In this screenshot I've only entered the desired refresh rate ...is it right?
What I've to do?? Thank you so much for any help...

[ToastyX]

(03-30-2019 09:53 AM)actarusfleed Wrote:  Hi , It's not completely clear to me how to use the tool you linked to me ...

In this screenshot I've only entered the desired refresh rate ...is it right?
What I've to do?? Thank you so much for any help...

It calculates the pixel clock and horizontal/vertical totals required to get a specific refresh rate. You'll have to figure out how much the hardware clock is off by and adjust the refresh rate accordingly.

[actarusfleed]

(03-30-2019 02:15 PM)ToastyX Wrote:  

(03-30-2019 09:53 AM)actarusfleed Wrote:  Hi , It's not completely clear to me how to use the tool you linked to me ...

In this screenshot I've only entered the desired refresh rate ...is it right?
What I've to do?? Thank you so much for any help...

It calculates the pixel clock and horizontal/vertical totals required to get a specific refresh rate. You'll have to figure out how much the hardware clock is off by and adjust the refresh rate accordingly.

Thank you but it still not clear to me sorry.
Can you suggest me "stop-by-step" what I've to do in my case?

just like you're explaining it to a child...

infinite thanks

[ToastyX]

(03-30-2019 04:35 PM)actarusfleed Wrote:  Thank you but it still not clear to me sorry.
Can you suggest me "stop-by-step" what I've to do in my case?

just like you're explaining it to a child...

infinite thanks

The detailed resolution you showed me has totals 4400x2250 and pixel clock 237.37 MHz:

237370000 / 4400 / 2250 = 23.97676... Hz

Your screenshot shows 23.97797 Hz:

23.97676... - 23.97797 = -0.0012023...

That's how much it's off by. So you need:

23.97676... - 0.0012023... = 23.9755653... Hz

If you put 23.9755653 Hz into the pixel clock calculator, it will give you the pixel clock and horizontal/vertical totals needed to get close to that refresh rate: https://www.monitortests.com/pixelclock....23.9755653

Both CRU and the NVIDIA control panel have horizontal/vertical totals that you can enter manually. CRU also lets you type in the pixel clock instead of the refresh rate, while the NVIDIA control panel only lets you type in the refresh rate.

The easiest thing to try first would be to simply change the custom resolution refresh rate to 23.975 Hz, since it's off by around 0.001 Hz.

If you want to tweak it further, try entering the values given by the pixel clock calculator. Keep in mind the projector might not be able to handle certain horizontal/vertical total combinations, so you might want to test with the NVIDIA control panel first.

If I put the 560 horizontal blanking in the pixel clock calculator, I get something close that should work:

237.78 MHz 4400 x 2254 @ 23.975558603 Hz (-0.000006697 Hz)

Simply change the custom resolution totals to 4400x2254 and the pixel clock to 237.78 MHz, and it should be closer to what you want. Keep in mind that measurements are not exact either because Windows is not a real-time operating system, but this should reduce the number of frame repeats.

Here's another guide that goes into detail: https://forum.doom9.org/showthread.php?t=173571

[boancatudor]

I have a problem. So the software works and I can overclock my monitor to 70 Hz (can't go higher because a higher Hz won't show up in the monitor tab). The thing is that every time I restart my laptop, I have to open the "restart64.exe" file again so that the 70 Hz apply again. If not, if I go in the monitor tab, the 70 Hz option will be missing. I am using a laptop with a dedicated monitor connected through HDMI (a BenQ GW2255).

Please help me! Thank you!

[outliner]

Hello guys!

ive been having an issue after trying to set my tv to 120 hz native on my dual screen setup. this is to achive my goal of having my pc output a 12 bit color signal with 120hz. the problem is that when ive set everything up and shutdown my tv. my other monitor randomly starts to flash a black screen serveral times at a time. im completly clueless why this is happening and its very frustrating for me. anyone that can help? ive been searching for anwers without any luck.

[aeneas1]

(03-12-2019 08:55 PM)ToastyX Wrote:  

(03-12-2019 05:15 PM)aeneas1 Wrote:  i see how to set up 1920 x 820 / 30hz and 60hz and 3840 x 1634 / 30hz and 60hz, but i don't know how to fill out the rest of the fields, are there default settings for these fields or someplace i can find the info? thanks very much!

Use the "LCD standard" timing option to fill in the values. The values themselves don't matter much as long as they aren't too low. The original purpose was to give the electron gun time to move between lines/frames on a CRT monitor. That's not as important with digital monitors, but most still need some time for processing. Standards exist to make sure certain values always work, but that only applies to resolutions the monitor officially supports. When adding custom resolutions, there's no guarantee the monitor will accept the resolution or any particular timing parameters. If the monitor can't handle those resolutions, you can use GPU scaling. With GPU scaling, the timing parameters don't matter since the GPU will scale the resolutions to the native resolution.

went ahead and used "lcd standard" per you recommendation and while the video resolution works fine it kills the audio, no audio is available - but when i delete the custom resultion and revert back to the windows resolution setting, audio returns.

i'm using a nuc i7-8559U, windows 10 pro latest build, hdmi out, oem installed realtek audio drivers, latest intel display audio drivers.

[ToastyX]

(04-01-2019 01:55 AM)boancatudor Wrote:  I have a problem. So the software works and I can overclock my monitor to 70 Hz (can't go higher because a higher Hz won't show up in the monitor tab). The thing is that every time I restart my laptop, I have to open the "restart64.exe" file again so that the 70 Hz apply again. If not, if I go in the monitor tab, the 70 Hz option will be missing. I am using a laptop with a dedicated monitor connected through HDMI (a BenQ GW2255).

That can only happen if there's a graphics driver bug. What GPU(s) does the laptop have? What version of Windows are you using?

[ToastyX]

(04-01-2019 08:51 AM)outliner Wrote:  ive been having an issue after trying to set my tv to 120 hz native on my dual screen setup. this is to achive my goal of having my pc output a 12 bit color signal with 120hz. the problem is that when ive set everything up and shutdown my tv. my other monitor randomly starts to flash a black screen serveral times at a time. im completly clueless why this is happening and its very frustrating for me. anyone that can help? ive been searching for anwers without any luck.

What video card do you have? When you say the monitor flashes a black screen, how long does it do this? Does it stop after a few seconds or does it continue indefinitely?

[ToastyX]

(04-01-2019 10:18 PM)aeneas1 Wrote:  went ahead and used "lcd standard" per you recommendation and while the video resolution works fine it kills the audio, no audio is available - but when i delete the custom resultion and revert back to the windows resolution setting, audio returns.

i'm using a nuc i7-8559U, windows 10 pro latest build, hdmi out, oem installed realtek audio drivers, latest intel display audio drivers.

HDMI audio is transmitted during the blanking periods, so you probably need to increase the blanking. Try using "LCD standard" and put in 1920x1080 @ 30/60 Hz, then switch to "Manual" and click the "Total" radio button to lock in the totals, then change the resolution to 1920x820. Do the same starting with 3840x2160, and change the resolution to 3840x1634.