Alright, I've got a brand new GTX 275. Just installed it into a Asus P5N-E SLI and I've got no video, period. I don't think I have any sound either, as the computer boots up, but I can't hear and Windows boot/log in sounds. At least, I think it makes it to Windows. Any ideas? I've got the power cables plugged in properly, as it has power just like everything else. Power supply is 750 watts. As far as the card being seated properly, I've checked out both PCI-E slots, and used both DVI ports on each slot. Any ideas at all?