Originally Posted by Digital MasteR
yea there is a possibility about faulty gpu or maybe it has to low voltage by default and craps out when stressed to much, i had that if i oc'ed gpu mem to high.
and try different drivers..
267.59 550Ti with modded inf. looks interesting, otherwise 263.15tesla (again modded inf.) looks like a great stable driver, far more than any 260, 265,266, 267.2x driver, some 460gtx said the same.
Thanks! I think it was a faulty GPU. I exchanged it for another one and it's fine. Then I overclocked it too much and found that it has the same error (but only when overclocked too much). So it's okay now.
I might slightly increase the voltages later on.