See
http://www.tomshardware.com/forum/261222-31-build-advice
Try -
AMD -
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($85.50 @ SuperBiiz)
Motherboard: Gigabyte GA-970A-D3P ATX AM3+/AM3 Motherboard ($61.98 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($56.89 @ OutletPC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($44.10 @ SuperBiiz)
Video Card: Gigabyte Radeon R7 260X 2GB WINDFORCE Video Card ($112.98 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($47.99 @ Micro Center)
Power Supply: XFX TS 550W 80+ Bronze Certified ATX Power Supply ($71.98 @ Newegg)
Total: $481.42
OR Intel -
CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($62.10 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($26.98 @ OutletPC)
Motherboard: ASRock Z97 Anniversary ATX LGA1150 Motherboard ($72.98 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1866 Memory ($65.75 @ OutletPC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($44.10 @ SuperBiiz)
Video Card: Gigabyte Radeon R7 260X 2GB WINDFORCE Video Card ($112.98 @ Newegg)
Case: Corsair Graphite Series 230T Black ATX Mid Tower Case ($48.99 @ NCIX US)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($53.10 @ SuperBiiz)
Total: $486.98