I am assuming that you can only run 2 cards SLI with PCI Express... correct?
I'm building a computer for a friend of a friend that has already has a
6800GT AGP card. He's not going to like having to get a new video card if
that's the case...

Also would an Antec TruePower 2.0 TP-II 430 480W Power Supply be enough to
power the system with 2 6800GT's (providing he can get two new cards), 1 WD
74gig Raptor, Asus A8nSLI Deluxe, & a DVD-Rom drive? Or shoud I step up to a
480 (or possibly higher).

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