Ok, so I bought a 6970 and plugged it into my m3a79-t deluxe motherboard about 7 or 8 months ago. Plugged in the power cables and tried to boot up and it fried my motherboard. I RMA'ed the mobo and returned the video card for a full refund but never actually was able to determine what had caused the problem. Today I'm doing research on upgrading again and I was reading the AMD system requirements for the 6970, and they specify one 8pin 150w cable, and one 6 pin 75w cable to power the video card. My power supply IS on the approved list for this card, its a tx850w Corsair. This said my 8 pin cable is plugged into my motherboard, and my PCI-e power cables have this extra wire hanging off of them with an extra 2 pins to equal 6, or 6+2 or 8 pin. So the questions I have for those of you with more technical experience than me is. Do these PCI-E cables with the extra 2 pin option put out 150 watts when used as an 8 pin? Or do they still only put out 75 watts? Could this be how the 6970 fried my mobo?