PCPartPicker part list:
http://pcpartpicker.com/p/KniT
Price breakdown by merchant: http://pcpartpicker.com/p/KniT/by_merchant/
Benchmarks: http://pcpartpicker.com/p/KniT/benchmarks/
CPU: AMD FX-4100 3.6GHz Quad-Core Processor ($104.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Outlet PC)
Motherboard: ASRock 970 Extreme3 ATX AM3+ Motherboard ($84.99 @ Amazon)
Memory: Kingston Blu 8GB (2 x 4GB) DDR3-1600 Memory ($43.84 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ Outlet PC)
Video Card: Sapphire Radeon HD 7770 GHz Edition 1GB Video Card ($124.99 @ Newegg)
Case: BitFenix Merc Alpha (Black) ATX Mid Tower Case ($39.99 @ NCIX US)
Power Supply: Corsair Builder 430W 80 PLUS Certified ATX12V Power Supply ($34.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.98 @ Outlet PC)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $629.71
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-17 18:17 EDT-0400)