$700 Budget gaming PC build(im new to PC's)

[MACK2411]

I am hoping for some help building my first PC for as close to as possible to $700. I really need help with this because as i said i am very new to PC's. If you will provide me with possible builds that would be very helpful. I already have a mouse, keyboard, and monitor but will need a OS so please include that with it. Thanks in advance

 

[bodeen2012]

PCPartPicker part list: http://pcpartpicker.com/p/2F1Rd
Price breakdown by merchant: http://pcpartpicker.com/p/2F1Rd/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2F1Rd/benchmarks/

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ TigerDirect)
Motherboard: ASRock 970 Extreme3 R2.0 ATX AM3+ Motherboard ($74.99 @ Newegg)
Memory: Mushkin Silverline 8GB (2 x 4GB) DDR3-1600 Memory ($69.97 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX US)
Video Card: PowerColor Radeon R9 270 2GB Video Card ($190.99 @ NCIX US)
Case: Cougar Solution (Black) ATX Mid Tower Case ($39.99 @ Mwave)
Power Supply: Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply ($49.99 @ TigerDirect)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($15.99 @ TigerDirect)
Operating System: Microsoft Windows 8.1 - OEM (64-bit) ($94.98 @ OutletPC)
Total: $706.88
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-21 11:04 EST-0500)

 

[KleptoManiaK]

I could sell you my old computer. IT runs great I can play the new batman in highest settings league of legends in ultra.

Here are the specs:
MSI 870a Fuzion
AMD Phenom II
Radeon 6770 GPU
8GB of Kingston Memory
750W PSU
Zantac Case with blue LED fans
Optical drive.

The only thing it doesn't come with is the HDD's I am going to keep them for my new build.
Let me know what you think.