That should work OK. But I'd get a better power supply eg Seasonic 520, XFX 550 or Antec HCG 520M
Also - Look at Tom's - http://www.tomshardware.com/reviews/build-your-own-budg...
but you'd probably have to drop to a gtx760 to get within budget.
and look at other $700 builds
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
CPU Cooler: Cooler Master Hyper TX3 54.8 CFM Sleeve Bearing CPU Cooler ($17.64 @ NCIX US)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($81.98 @ SuperBiiz)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($56.98 @ OutletPC)
Video Card: PowerColor Radeon R9 270X 2GB Video Card ($179.99 @ NCIX US)
Case: Antec One ATX Mid Tower Case ($39.99 @ NCIX US)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Optical Drive: Asus DRW-24F1ST DVD/CD Writer ($21.97 @ OutletPC)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)