PCPartPicker part list:
http://pcpartpicker.com/p/2YocB
Price breakdown by merchant: http://pcpartpicker.com/p/2YocB/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2YocB/benchmarks/
CPU: AMD Phenom II X4 945 3.0GHz Quad-Core Processor ($80.98 @ SuperBiiz)
Motherboard: ASRock 970 PRO3 R2.0 ATX AM3+ Motherboard ($64.99 @ Newegg)
Memory: A-Data XPG V1.0 4GB (1 x 4GB) DDR3-1600 Memory ($30.99 @ Newegg)
Memory: A-Data XPG V1.0 4GB (1 x 4GB) DDR3-1600 Memory ($30.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: XFX Radeon HD 7770 GHz Edition 1GB Video Card ($105.38 @ Newegg)
Case: Thermaltake Commander MS-I ID ATX Mid Tower Case ($32.99 @ Microcenter)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($25.99 @ Newegg)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($14.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($99.97 @ OutletPC)
Total: $547.25
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-23 00:19 EST-0500)
As close as i can get, you need a discrete card to do anything half ass with games.