I supposed you don´t need the OS, but if need more money for it just go for the gtx 760 and you´ll be great.
PCPartPicker part list:
http://pcpartpicker.com/p/2uYDb
Price breakdown by merchant: http://pcpartpicker.com/p/2uYDb/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2uYDb/benchmarks/
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($149.99 @ TigerDirect)
Motherboard: Gigabyte GA-990FXA-UD3 ATX AM3+ Motherboard ($134.99 @ NCIX US)
Memory: Corsair 8GB (2 x 4GB) DDR3-1600 Memory ($79.99 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: MSI Radeon R9 280X 3GB Video Card ($339.99 @ B&H)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($57.99 @ NCIX US)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Total: $872.92
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-03 13:23 EST-0500)
EDIT: Changed the hdd like whammy said.
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