I've tried 12.3 & 12.4 (clean installs every time), all the OC programs (AB, GPU Tweak, Trixx, Overdrive) and I CAN'T get this thing to OC. As soon as i change clock, it crashes in 3D apps! WHY?!
I have experience with OCing, so it's not first time I'm doing this. Really don't know whats the deal here.
Also, I tried both BIOS 1 & 2.
Was same here, did 4 win-reinstalls, tried everything, talking 60+hours testing... As soom as i did a OC it crashed, got a "video hardware error" in the reability logs...
Then suddenly the oc worked, have no idea what did that...lol