Will these parts work together?

COD Ghost is HORRIBLY optimized, and runs like crap on everything. Now if you were to play a real FPS game, built correctly, I would suggest not getting the 630. Save a few dollars and get a 2x4GB set of RAM, and use that to get a better graphics card.

My RAM suggestion: http://www.newegg.com/Product/Product.aspx?Item=N82E16820313355
My GPU suggestion: http://www.newegg.com/Product/Product.aspx?Item=N82E16814150666

Also, I have heard bad things about problems getting 8.1 OEM to install correctly...