Would these parts make a decent gaming PC?

This is my first PC build ever and critique it however you would like to. I just need advice on what I may be doing wrong and what I could do better. It is a budget build. I am willing to spend an extra $100 and am open to upgrading or downgrading items. My goal is for it to be able to play games on max settings with at least 60fps for games such as Skyrim, Shogun 2, Rift.

CPU AMD Phenom II X4 965 Black Edition Deneb 3.4GHz (own it): http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Video Card: Gigabyte AMD Radeon HD 7950 3GB GDDR5 @ $290.00 :http://www.superbiiz.com/detail.php?name=GA-795WF3G

PSU: Corsair 600CX(already have it): http://www.amazon.com/gp/product/B004W2T2UQ/ref=oh_deta...

MOBO: ASRock 990FX Extreme3 AM3+ AMD 990FX @ $119.00: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

or http://www.newegg.com/Product/Product.aspx?Item=N82E168... @$129.99

RAM: Samsung DDR3 SDRAM $16.74 x 2 = 8 gigs @ $33.48 total : http://www.amazon.com/dp/B0059200FY/?tag=pcpapi-20

Harddrive: I have a stock HP 500gig.

DvD Drive: Stock from old rig.

Case: Rosewill Challenger : http://www.newegg.com/Product/Product.aspx?Item=N82E168... @ $49.99