Custom Resolution Utility (CRU)

[ToastyX]

(07-08-2015 12:49 AM)rancur3p1c Wrote:  here's an Imgur album of framerate test photos taken at 87hz.
What's with the double-lit squares? Same frame being displayed again?

That's what it looks like, but that normally only happens with lower refresh rates. That shouldn't happen with higher refresh rates unless the panel is refreshing slightly faster than the actual refresh rate.

(07-08-2015 12:49 AM)rancur3p1c Wrote:  BTW, on Windows 7 there is a bug in Chromium that's been closed/won't fix about how it only renders at 60fps, even the desktop refresh rate is higher.

I'm not seeing this issue with Chrome on Windows 7. I've only seen it render at 60 FPS if desktop composition or hardware acceleration is disabled or if the graphics driver is restarted while Chrome is still running.

(07-08-2015 12:49 AM)rancur3p1c Wrote:  Regarding the horizontal lines, is there any porch or width I could tweak to handle this? What is going on to cause this? I guess I'll go read about DVI protocol and see if I can't intuit what's going wrong. It seems like every 3-4 horizontal rows of pixels there's a 4th or 5th that's lighter/whiter on a light grey background (like Chrome browser menus).

That seems more like a panel or hardware limitation in the monitor, not an issue with the timing parameters. You can try other timing parameters like "LCD standard" at 2560x1440 @ 85 Hz, but that probably won't make a difference.

(07-08-2015 12:49 AM)rancur3p1c Wrote:  here's another album of tests at 75hz. At 75hz, no double-rendered frames, and no horizontal lines running across the display at each pixel.

It looks like the monitor can only handle up to 75 Hz properly.