gaming build ($650)

See http://www.tomshardware.com/forum/261222-31-build-advice

Try

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($176.95 @ SuperBiiz)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard ($81.89 @ OutletPC)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($54.89 @ OutletPC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($48.75 @ OutletPC)
Video Card: MSI GeForce GTX 960 2GB Video Card ($199.99 @ NCIX US)
Case: Corsair 200R ATX Mid Tower Case ($54.99 @ Micro Center)
Power Supply: Rosewill Capstone 550W 80+ Gold Certified ATX Power Supply ($39.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 OEM (64-bit) ($85.75 @ OutletPC)
Total: $743.20