(I'm not totally sure on this) I think i scratched the gold PCI-E connector on the card, when I removed it from my motherboard, I took it out to clean my PC and when I put the card back in I got no display at all, but the fan worked ok.
Lesson learnt, Be careful when removing graphics cards.
When it was working I had it OC'd to 820 core and 4200 mem. No extra voltage, it was nice and cool (roughly 65C when gaming) about 31 idle : )
Oh BTW i killed it within 2 weeks : /
Believe the hype: http://www.lostcircuits.com/mambo//index.php?option=com_content&task=view&id=67&Itemid=1