I got my rma number form xfx and also told them about the number of problems I'm reading on the net. There reply was that there is no specific problem with the cards..... Maybe they would just say that?! Anyways I've been running demos and benches all night at 875 and 1250 even auto fan and had no crash at all tonight... So that's only 50 down on the expected memory speed.... BUT should I still RMA it... Confused now. Unless I get crashes at another time. Frustrating.