PCPartPicker part list:
http://pcpartpicker.com/p/zZZK
Price breakdown by merchant: http://pcpartpicker.com/p/zZZK/by_merchant/
Benchmarks: http://pcpartpicker.com/p/zZZK/benchmarks/
CPU: AMD Phenom II X4 975 3.6GHz Quad-Core Processor ($82.18 @ SuperBiiz)
Motherboard: Gigabyte GA-970A-DS3 ATX AM3+ Motherboard ($81.88 @ Amazon)
Memory: Corsair XMS3 8GB (2 x 4GB) DDR3-1600 Memory ($37.99 @ Newegg)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($49.99 @ Amazon)
Video Card: MSI Radeon HD 6770 1GB Video Card ($86.97 @ Newegg)
Case: Rosewill Blackbone ATX Mid Tower Case ($31.99 @ Amazon)
Power Supply: Antec Neo Eco 620W 80 PLUS Certified ATX12V / EPS12V Power Supply ($29.99 @ Newegg)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.99 @ Newegg)
Total: $420.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-27 21:43 EST-0500)
Base Total: $431.81
Mail-in Rebates: -$20.00
Shipping: $9.17
Total: $420.98
thats the best ur gonna get with ur budget, maybe run it on medium.