GTX 780 OC vs R9 290 OC

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http://hardforum.com – I'm in a tight possession right now trying to decide which to go with. I was wondering if anybody knew how they compare to each other at the same clocks.Temps and noise don't matter to me as either will be under water. My Options Evga GTX 780 Classified (B1 Revision) or (xxxx) R9 290 (Hardware)