Actually, this build might do:
PCPartPicker part list:
http://pcpartpicker.com/p/Nk6wnQ
Price breakdown by merchant: http://pcpartpicker.com/p/Nk6wnQ/by_merchant/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($94.99 @ Amazon)
Motherboard: MSI 970 GAMING ATX AM3+ Motherboard ($74.24 @ Newegg)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($59.89 @ OutletPC)
Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ Amazon)
Video Card: Sapphire Radeon R9 280 3GB Dual-X Video Card ($159.99 @ Newegg)
Case: Corsair SPEC-03 Red ATX Mid Tower Case ($74.98 @ Newegg)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply ($36.99 @ Newegg)
Total: $571.07
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-05-17 10:48 EDT-0400