Im overclocking my Radeon HD 5850. When i overclock it by 5mhz my second screen freaks out and flickers on mouse clicks, scrolling, anything to do with user input basically. I use the ATI Catalyst Control Center, ive tried MSI Afterburner, nothing they both end up doing the same. Ive used the auto tune with ATI CCC and the same thing happened, so i figured id test the 5mhz OC as i mentioned above and the same thing happens. So ive done my research and read that it has to do something with the fact that the idle clocks drop to below 400 while the memory stays around normal, which causes the screen to flicker... Ive also read that using HDMI can contribute to this. Anyone know a solution to this? Im using the most recent v11.8 drivers from ATI. Any help is much appreciated, Thanks!