What uses more power?

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Joined
15 Mar 2010
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967
Say setup A has a stock i7 950 and a GTX 570, and uses a 900w PSU with 90% efficiency rating.

and setup B has a stock i7 950 and a GTX 570, but uses a 1500w PSU with the same 90% efficiency rating.

Under the exact same conditions, doing the exact same things, the only difference being the PSU wattage

Which uses more power?
 
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