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That sounds about right, as I said earlier, the actual jack will be 8 pin on both but only one will actually have 8 wires as one terminates in an 8pin PCIE connector and the other terminates in a 6pin PCIE connector![]()

You won't regret it
Are you gaming at 1920x1080 @ 60hz?

Radeon HD 7970 - On your average system the card requires you to have a 550 Watt power supply unit.
Radeon HD 7970 Crossfire - On your average system the cards require you to have a 750 Watt power supply unit as minimum.
If you are going to overclock the GPU or processor, then we do recommend you purchase something with some more stamina
I'm sure it would be fine too. I've got a heavily over clocked sandy bridge system and a 7950 and have no problems with a 650w PSU.
