Which computer is better for gaming?

i want to but a computer for gaming and liked both of these. Can you tell me which one is better if not recommend me one for $500-$700. I want to play games like gmod minecraft skyrim bf4 cod dayz and others

ASUS M51BC-US008O Desktop PC AMD FX-Series FX-6300 (3.50GHz) DDR3 1600MHz 8G x 2 Windows 7 Home Premium 64bit

http://www.newegg.com/Product/Product.aspx?Item=N82E16883220567&ignorebbr=1

or

BUYPOWER Source Series NE651FX Desktop PC AMD FX-Series FX-4300 (3.80GHz) 8GB DDR3 Windows 7 Home Premium 64Bit

http://www.newegg.com/Product/Product.aspx?Item=N82E16883227543

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