Hello ! first post here ^^ I bought today a 6950 hd 1ghz (gygabite), and my computer won't boot with it. I bought along with it a Corsair CX600, motherboard is Asus P7P55-M. Both 75 (6 pin) PSU are plugged in the (only) PCI-E 16x slot of the board. When eveything is plugged and I try to boot, I can feel the CPU fan doesnt spin fast enough, and nothing boots. It gets power but then nothing happens, not even the first Beep. So I stripped the computer naked of all peripherals, including HDD's, i mean i unplugged everything, its just the power supply into the MB, the 4 pin ATX, the card and both its PSU. Doesnt boot. If I put my old gforce 8600 instead (with the new corsair supply) , it boots to windows, no worries. So tell me ... hardware failure ? MB incompatibility ? Can't figure that one out.... Thanks in advance !!