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good build couple of changes though
Switch SSD to a Crucial M4 or OCZ Vertex 4
Check out the ASRock Z77 Extreme4 you should be able to save a couple dollars there
You dont need 16GB of RAM for gaming if that is what this build is for switch to this
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233186
Take PSU down to 550W if you dont plan to SLI or bump it up to 750W if you do plan to SLI down the road