Much stronger i5, better motherboard, and a MSI 270x
PCPartPicker part list:
http://pcpartpicker.com/p/3JkDW
Price breakdown by merchant: http://pcpartpicker.com/p/3JkDW/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3JkDW/benchmarks/
CPU: Intel Core i5-4590 3.3GHz Quad-Core Processor ($199.99 @ Newegg)
Motherboard: Gigabyte GA-B85M-D2V Micro ATX LGA1150 Motherboard ($59.79 @ Newegg)
Memory: Kingston Fury Black Series 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Amazon)
Storage: Hitachi Ultrastar 1TB 3.5" 7200RPM Internal Hard Drive ($49.99 @ Amazon)
Video Card: MSI Radeon R9 270X 2GB TWIN FROZR Video Card ($199.99 @ Amazon)
Case: Antec GX500 ATX Mid Tower Case ($29.99 @ Newegg)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($34.99 @ NCIX US)
Optical Drive: Lite-On iHAS124-14 DVD/CD Writer ($19.99 @ Newegg)
Total: $651.72
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-13 15:14 EDT-0400)