Read
http://www.tomshardware.com/forum/261222-31-build-advice and provide any info that will help us.
Try -
CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($176.95 @ SuperBiiz)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard ($75.98 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($52.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($46.89 @ OutletPC)
Video Card: MSI GeForce GTX 750 Ti 2GB Video Card ($148.99 @ SuperBiiz)
Case: Corsair 100R ATX Mid Tower Case ($39.99 @ Micro Center)
Power Supply: Antec 450W ATX Power Supply ($19.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 OEM (64-bit) ($86.75 @ OutletPC)
Total: $648.53