I edited your build, adding a case, power supply and RAM. It goes just over your budget - hopefully that won't be a problem. Also, if you're going to OC your CPU, you'd need to buy an after market cooler, which would make this build even more expensive. So, if you can't scrape together enough money, don't OC your CPU for now.
PCPartPicker part list:
http://pcpartpicker.com/p/3byCL
Price breakdown by merchant: http://pcpartpicker.com/p/3byCL/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3byCL/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($79.79 @ Newegg)
Memory: Corsair XMS3 8GB (2 x 4GB) DDR3-1333 Memory ($74.99 @ Micro Center)
Video Card: EVGA GeForce GTX 750 Ti 2GB Video Card ($149.99 @ NCIX US)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case ($45.99 @ Mwave)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Total: $510.74
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-17 15:36 EDT-0400)