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To test power consumption today we are using a Keithley Integra unit and we measure power consumption from the VGA card inputs, not the system wide drain. We measure results while gaming in Crysis Warhead and the synthetic stress test Furmark and record both results.
The Asus GTX750 Ti STRIX OC, like all Maxwell solutions we have tested is consuming very little power – hitting around 60 watts under gaming load. It takes all the power it needs direct from the PCI e slot.
Nvidia have such an advantage now when it comes to power efficiency – AMD have some way to go to make up lost ground. Look at the reference clocked HD7850 – it consumes 115 watts when gaming which is almost twice the demand of the GTX750 Ti in the same load situation.
