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Reference HD 7970 cards come with one 6-pin and one 8-pin power connector which is enough to secure 300W for the card. In extreme situations and at reference clocks, HD 7970 can draw up to 270W. This prompted PowerColor to play it safe and throw in two 8/pin connectors on its HD 7970 Vortex II, which means that the card has up to 375W at its disposal.
In 3D mode, HD 7970 Vortex II draws up to 1.18V, which is close to what the reference HD 7970 requires.
PowerColor PCS+ HD 7970 Vortex II consumes more than the reference design, but it’s to be expected considering the high clocks.