Best 800 Dollar Gaming PC Build Help

PCPartPicker part list: http://pcpartpicker.com/p/36oV0
Price breakdown by merchant: http://pcpartpicker.com/p/36oV0/by_merchant/
Benchmarks: http://pcpartpicker.com/p/36oV0/benchmarks/

CPU: AMD FX-8320 3.5GHz 8-Core Processor ($159.99 @ Newegg)
Motherboard: ASRock 990FX Extreme3 ATX AM3+/AM3 Motherboard ($104.99 @ Newegg)
Memory: GeIL EVO POTENZA 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($57.99 @ NCIX US)
Video Card: Asus Radeon R9 270X 2GB Video Card ($223.99 @ Staples)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($49.99 @ Microcenter)
Power Supply: EVGA 600B 600W 80+ Bronze Certified ATX Power Supply ($44.99 @ NCIX US)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($15.99 @ Microcenter)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.99 @ NCIX US)
Total: $792.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-08 15:53 EST-0500)