And my gpu is Sapphire r9 280x vapor-x tri-x edition (1000/1500 stock)
So my problem is when i try to overclock the gpu. My 2nd monitor starts to flicker like crazy but only when the card is not at load. When i start a game for example it stops the flickering. And this happens even when i push it from 1000 to 1001 or from 1500 to 1501. The problem is not in the psu or the psu cables,not in the cooling, not in the hdmi cable and its not getting hotter than 65C at load. I've had this problem for a few years now. My Drivers are always up to date. Before that i was running 1100/1600 24/7 with no problems but suddenly it started doing that. I've reinstalled Windows a few times, tried a few versions and it doesnt help. For overclocking software im using the AMD OverDrive.