Last month my 4870X2 started to artifact during 3d applications.
The strange thing is if i Alt-Tab out of the 3D application before the PC crashes it will fix the artifacts for that period or untill i restart the 3D applications.
I also noticed in CCC that the second core never has any activity and remains at a low temp while the other core works its tits off.
However i dont see a drop in benchmark performance so is the core really stuck? hmmm puzzling
The card runs hot. always has done but no more than usual.
i was going to chuck it in the bin this morning as i have a 6970 unless anyone knows of a possible solution or even if someone wants to have it for spares and repairs if i can't fix it.