I want to use this pc mostly for gaming.
AMD FX-6300 Cpu
Gigabyte 7950 3gb ddr5 gpu
2x4gb ddr3 1600MHz ram
Sharkoon Vaya case
Asus M5A97 r2.0 motherboard
Cooler master GX450w
Western digital 1tb 64mb sata3 hdd
That will work just fine. I'd swap out the power supply for a Corsair CX series though. Better quality, and still a very good value. Here's a website for ya: pcpartpicker.com Check it out. I couldn't find the case, so I added a different one, I also changed out your video card for what I believe to be a better one; faster core clock and comes with 4 free games.