Re: What Kind of Power for 260 GTX SLI?
You have power hungry components, but it should be OK. If you OC alot you'll be pushing it. If you've got the cash I would go for an upgrade. I can't recommend the Galaxy 850w enough, awesome PSU, but very long.
EDIT: In fact the more I think about it, I would upgrade for sure. 680i, Q6600, SLI 260's, that adds up to quite alot.