PCPartPicker part list:
http://pcpartpicker.com/p/2xZEV
Price breakdown by merchant: http://pcpartpicker.com/p/2xZEV/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2xZEV/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Newegg)
Motherboard: ASRock 960GM/U3S3 FX Micro ATX AM3+ Motherboard ($53.99 @ Newegg)
Memory: Crucial Ballistix Sport 4GB (1 x 4GB) DDR3-1600 Memory ($37.99 @ Newegg)
Storage: Hitachi Ultrastar 1TB 3.5" 7200RPM Internal Hard Drive ($52.00 @ Amazon)
Video Card: Sapphire Radeon HD 7770 GHz Edition 1GB Video Card ($84.98 @ SuperBiiz)
Case: NZXT Source 210 (White) ATX Mid Tower Case ($39.99 @ Amazon)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($19.99 @ Microcenter)
Monitor: Dell E2213H 60Hz 21.5" Monitor ($101.99 @ Staples)
Total: $500.92
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-08 17:44 EST-0500)
Normally you go AMD when you are on a low budget. The 7770 Is way better than the GTX 650.
The FX 6300 its a 6 core cpu, this will help you alot in Heavy Cpu Games like most MMO and RTS, Intel I3 its faster in Single Core Programs but not that much. You still get better Framerates with a 6 core than a 2 core cpu. And to even see a bottleneck you will need to pair this cpus with a 500 usd Video Card.