I'm getting occasional texture artifacts which I captured with fraps:
(DX11 + HRtextures + everything@ultra)
I have an 'EVGA gtx 570 superclocked' running at stock speeds. Temperature is not an issue as it hits 82C max and artifacts are there at lower temps anyway. I've also tried clean installs of nvidia drivers 275.33 and 280.26. Other games seem to be okay although one (ut2004) had some artifacts a few days ago but it's been fine since then. My card is only 3 weeks old - hope it's not already dying.