PCPartPicker part list:
http://pcpartpicker.com/p/2uLVZ
Price breakdown by merchant: http://pcpartpicker.com/p/2uLVZ/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2uLVZ/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ TigerDirect)
Motherboard: Gigabyte GA-970A-DS3P ATX AM3+ Motherboard ($79.99 @ Newegg)
Memory: Corsair 8GB (2 x 4GB) DDR3-1600 Memory ($79.99 @ NCIX US)
Video Card: Asus GeForce GTX 760 2GB Video Card ($239.99 @ Microcenter)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Total: $559.95
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-03 02:04 EST-0500)