A few months ago when I got a new monitor, I made a topic on this forum concerning screen 'tearing' that had never occurred before. I was convinced it was the monitor, but I eventually blamed it on overheating. I returned the GPU to stock speeds and turned up the fan. Everything worked out. However, yesterday I tried overclocking it again, and when I raise the memory speeds by a certain amount, during gaming or sometimes even flash videos half of my screen moves to the other side of the monitor. At this point I am wondering whether it's an actual problem with the graphics card, or some kind of bug. I have also ruled out the possibility of it being the drivers as the problem started months ago and I have updated them many times since. Could anyone help me out?
Here is what I am using:
AMD Phenom II x4 980
8 GB Kingston ValueRAM
650W XFX Power Supply
XFX Radeon 6870 Black Edition w/12.2 Catalyst Drivers