Will my PSU support my build?

XxKINGxX40

Honorable
Sep 26, 2013
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0
10,640
Im planning to upgrade my GPU to 2 Radeon R9 280x in CF. My current build:

CPU: AMD FX 8350 (Not OC'd)
RAM: Corsair Vengeance 16GB (2 x 8) DDR3
GPU: Geforce GTX 650
MOBO: Gigabyte GA-990FXA-UD3
6 Fans. 3 120mm, 2 120mm LED, and 1 140mm LED

PSU: Corsair RM750. Will the RM750 support both 280x's? I put my specs with 2 Radeon HD 7970 (since they're basically the same GPUs) on the eXtreme power supply calculator, and it said 580W minimum.