I was just wandering if next GPU's will require better PSU's. Because im going with an 850 Watt - Corsair CMPSU-850TXV2 80 Plus Power Supply - Quad SLI Ready and i want to know if that will be able to handle next gen SLI card setups. If anyone has any info on the cards power consumption let me know. If so, will they consume less power or more power? I will be running two 570's but i was wondering if the that PSU is future proof for hypothetical cards such as SLI 670's.
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A 850 should be plenty.
That power supply will be fine. The 600 series if anything will be more power efficent then the 500 series.
The next series of cards will be on a 28nm process which is a rather large reduction and should increase power efficiency greatly.