AMD/ATI Pixel Clock Patcher

[ToastyX]

(05-16-2014 11:47 AM)donarkaz Wrote:  I just bought a ASUS PB248Q and I've tried to overclock the refresh rate using your tool the Configuration Utility, to 75hz. I'm using an AMD 280X 3GB gfx card...

I've tried both "Standard LCD" and "reduced LCD" profiles @ 75 hz but they both fail to display any image, with the OSD displaying "Out of Range". I even tried 65hz and that fails with "Out of Range" too...

The specs for this monitor state that it can go up to 76 hz vertical refresh rate..

My old Dell 2209WA monitor can easily do 75 hz refresh without any problems or side-effects using the Standard LCD profile @ 75 hz.

What could be the problem here? How can I fix it? Any help would be appreciated

The problem is the monitor doesn't support higher refresh rates at the native resolution. Most 1920x1200 monitors are not overclockable.

The specs are useless. They won't tell you what refresh rates the monitor will accept at the native resolution. The monitor might accept higher refresh rates at lower resolutions, but I've seen monitors accept higher refresh rates and skip frames, making it pointless.

(05-16-2014 11:47 AM)donarkaz Wrote:  I forgot to say I'm now using a DisplayPort cable to connect my new monitor, I used to use a DVI cable on my Dell monitor that 75hz refresh works though....

Could the Displayport be the problem?

The monitor might support different refresh rates with DVI, but that depends on the monitor.

DisplayPort itself would not limit the refresh rate. DisplayPort supports higher resolutions and refresh rates, but the monitor might not. DVI would require the patch to work properly past 165 MHz pixel clock.