AMD/ATI Pixel Clock Patcher

[ToastyX]

Are you sure hardware acceleration is disabled? The only thing I'm aware of that would cause screen corruption with video playback is the memory clock issue I posted on the last page:

(09-22-2013 01:38 PM)ToastyX Wrote:  The screen corruption is a separate issue unrelated to the patch. That happens if you're overclocking the memory on your video card when the vertical total is reduced.

AMD cards are programmed to change clock profiles when video acceleration is active, but the memory clock is not supposed to change when the vertical total is reduced because there isn't enough time for link retraining without screen corruption.

(09-22-2013 01:38 PM)ToastyX Wrote:  "LCD standard" keeps the blanking high enough to avoid the problem, but most 2560x1440 monitors can't handle that at 120 Hz. The easiest way around the problem is to leave the memory clock at stock.

(10-15-2013 06:28 AM)dstathis Wrote:  Thanks that worked. It was not getting displayed before. What exactly does "LCD reduced" mean? Does that mean I am getting reduced performance in other ways?

It reduces the blanking, which reduces the "space" between each line and each frame. This reduces the pixel clock (total pixels per second), which reduces the bandwidth required and provides a more stable signal. It does not reduce performance.

Blanking was mainly used to give CRT monitors time to move the electron gun. LCD monitors don't need as much, but some is still needed for synchronization and processing time. This can vary between different models, so there are standards to make sure every monitor can handle certain values. "LCD standard" uses those values, but many monitors can handle lower values. "LCD reduced" uses lower values for certain resolutions, which helps when trying to get higher refresh rates with some monitors.