Custom Resolution Utility (CRU)

[Ambro]

(11-02-2019 08:13 PM)ToastyX Wrote:  

(11-02-2019 07:26 PM)Ambro Wrote:  Both monitors are the BenQ XL2730 and are both connected via display port to an EVGA 1070 FTW running the latest 441.08 driver. I tried switching out the DP cable, both are certified, no effect there. I also tried unplugging my primary monitor, leaving only the secondary plugged in, and tried switching the DP positions on the graphics card.

I've done as you've instructed - both sets of files are included as attachments to this thread. Thank you for taking the time to help me troubleshoot this issue.

I think you are confused about what the defaults are. There is no difference between the two monitors other than the manufacture date, and there is no difference between the current and backup for each monitor. What was supposed to be different? I don't see anything unusual that would indicate something was changed, and both monitors have 2560x1440 @ 144 Hz defined, so that's not the problem.

The real problem is the video card seems to be negotiating a lower DisplayPort speed with that monitor for some reason, which wouldn't be because of the timing parameters. RGB is always supposed to be available, so the fact that only YCbCr 4:2:2 is available at 120 Hz indicates a bandwidth limitation. Since you already swapped the cables and the ports, try unplugging the monitor's power for a few minutes to reset it just in case there was a firmware glitch.

Despite the version of the monitor being the same, they're different model years, and the panels are different between both models and have different timings. When I first downloaded CRU, I looked at the timings for both and the secondary monitor I'm having issues with had different timings. When I went through the process of trying to get both monitors @ 143hz to support GSYNC (which they don't do by default ), I was having an issue with the second monitor(problem one) whereby it was displaying a black screen every time I would go into 143hz. To remedy this, I went into the primary monitor that was working correctly, and by hand, copied each of the timings to a text file so that I could replicate the same settings on the second monitor. As soon as i did this, the second monitor was syncing at 143hz, and everything was fine. At some point in the past few weeks for reasons unknown, the second monitor was suddenly unable to sync at 143/144hz, and is now demonstrating the issue I've explained. Both of these monitors did 144hz at my native resolution prior to this change. After using your reset tool, going into CRU shows that the timings for both of these monitors is the same, i.e. post the changes I made. I know the secondary panel has different timings but I'm not entirely sure what they used to be as I didn't take a screen capture.

The question I have is, when you adjust timings for the monitor, where is this preserved? does it get written back to the monitor or is it possible that the timing adjustment caused permanent damage to the panel and that's the reason why the native 144hz is now not supported? Just trying to determine if there's a way to get the monitor back to it's original default factory timings.