All AMD FX "Faildozers" have been proven to be crap when it comes to gaming.
Here is the best build for your money:
All prices are in $USD and in the US.
FACT: INTEL IS A MUCH BETTER PROCESSOR FOR GAMING THAN ANY AMD.
See here:
http://www.cpubenchmark.net/high_end_cpus.html
and a side by side Intel Core i5-2500K vs. AMD FX-8150:
http://www.anandtech.com/bench/Product/288?vs=434
Processor: Best would the new Ivy Bridge series, Intel Core i5-3570K ($245)
Second best would be Sandy Bridge Intel Core i5-2500K ($220)
Best budget processor would be Sandy Bridge Intel Core i3-2130 ($150)
Super budget would be Sandy Bridge Intel Core i3-2100 ($105)
For any processor above, buy a Z77 chipset motherboard, like this ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard ($125) or better:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
Buy 8GB (two x 4GB) G.Skill Ripjaws X Series DDR3 1600MHz RAM ($47)
Graphics card, nVidia GeForce GTX680 ($500) or at least a GTX560 Ti ($230). Only buy EVGA, ZOTAC or MSI FROZR II.
SSD Drive: Patriot Wildfire 240GB ($230) for Windows OS install
Seagate Barracuda 2TB SATA III, 7200rpm hard drive with 64MB Cache for data storage ($120).
Cooler Master Hyper 212 EVO, after market CPU cooler ($30)
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099
PC Case (Tower) Cooler Master HAF 912 ($60)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119233
Or Sentey Arvina Extreme Division Tower Case 6x Fan LED/ 4 x USB / Multi Card Reader / 4 x Fan Control / E-SATA / 6 x Removable Aluminum Bays / Screwless ($100)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811322008
Power supply (PSU) - Corsair Builder Series CX600 V2 600W ($70 - $50 after rebate)
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
Or Thermaltake TR2 RX 750W Bronze W0382RU ATX 12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply ($90)
http://www.newegg.com/Product/Product.aspx?Item=N82E16817153136
Any cheap $15 to $20 DVD Multi drive writer.
Windows 7 Home Premium 64bit OEM ($100)
Cost up to $1,600USD or £1,000GBP