Custom Resolution Utility (CRU)

[RzR32]

(06-08-2023 10:38 PM)ToastyX Wrote:  

(06-04-2023 02:08 AM)RzR32 Wrote:  Hello.

I recently discovered CRU and have been using it to create custom resolutions for myself. They've always worked within the normal range for me. I basically use the program to create native 60hz resolutions and then create a custom 77hz resolution through AMD Radeon Software (it's safer to do it that way in my head). I created many of them (1440x1080, 1600x1024, 1280x1080), all with 77hz (maximum my monitor supports, above that it has no video response). But recently I've preferred 1920x1080 since my game (Valorant) doesn't have in-game differences between 4:3 and 16:9 and I ended up finding it a problem. At 1920x1080 the maximum I can put is 73hz. I was curious and went to try to understand why. I read the whole document and understood that the reason for this is probably the "max pixel clock" which in my case is 170MHz (as in the image). But the doubt came to me, shouldn't my limit be 300MHz? I have an RX 570 (which has an HDMI 2.0b output) and an HDMI 2.0 cable as well. Shouldn't it have a higher pixel clock number? Or does this parameter depend on the monitor?

What happens beyond 73 Hz? The max pixel clock is not used if it's not included. AMD's driver also listens to the max TMDS clock in the HDMI data block in the CTA-861 extension block as described under pixel clock limits in the first post. You should be able to go up to 340 MHz with an RX 570 for HDMI 1.x. That kind of monitor wouldn't have HDMI 2.x.

At 1920x1080 above 73 Hz the image has "artifacts". As if I had chosen the "interlaced" option.

So all I have to do to achieve a higher clock is add an extension block (or import one of the hdmi.dat files from the first post)? So I can create a resolution with higher HZ?