Well, be having this issue for a few days. When running 2x or 3x sli, I get a weird, artifact-like horizontal black lines. AM3 work fine, but as soon as its ran through the front end, I get the artifacts. Tried XP, W7 x86, x64......all the same, even at stock gpu. It will pass the bench, but It's costing me ~20k points.
Anyone else with this issue???