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Old September 12, 2013, 10:55 AM
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SugarJ SugarJ is online now
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Join Date: Jan 2008
Location: Langley, BC
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I'd think you're good with your HX850. In SKYMTL's test system with a 6-core SB-E CPU and mobo, the stock 780 draws 406 watts. EVGA GeForce GTX 780 ACX SC Review

Your 4-core Haswell CPU should draw quite a bit less, and unless you're running 2x highly overclocked 780 Classifieds I think you have plenty of power head room.
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