Gaming Build for $500-600

[freebrownie]

I want to build a PC and I've found parts for a $1000 build (http://pcpartpicker.com/user/freebrownie/saved/4btk). I want to know if there is a system that can be built with similar performance to the one I picked for only $500-600. If not, just tell me the best one for that 500-600 price range.

 

[AMD Radeon]

you can start from here
if you have to include OS, you will end up getting Radeon 260X

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($107.99 @ NCIX US)
Motherboard: MSI 970A-G46 ATX AM3+ Motherboard ($69.99 @ Amazon)
Memory: Kingston Black 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.98 @ OutletPC)
Video Card: Sapphire Radeon R9 270X 4GB Video Card ($225.38 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($44.99 @ NCIX US)
Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply ($44.99 @ Newegg)
Total: $613.31
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-01 10:45 EDT-0400)