I have been looking to get more into pc gaming and want to upgrade and configure my old desktop completely if possible which i believe I should be able to do. The tower I have is from a Dell Optiplex 330 that ran Windows Xp home edition and only had a 1.8 GHZ processor and that is a single processor not dual core, and 2GB Ram with a 250 GB hard drive. I want the budget to stay somewhere between $450-$550 for rebuilding my system and looking to play pc games like NBA 2k15, Titanfall, Battlefield 4, Call of Duty Ghost and some Elder Scrolls and Lord of The Rings games. What could you recommend for me to do, to build a good system that I would hope could perform with hitting the 60 FPS or higher and i won't be needing a keyboard, mouse or monitor for this project as I will already have those. I already have a LCD monitor from Dell, so i should be good for playing games in HD settings. Right now it has been seeming like a better bet would be for me to go replace all my components as far as get a brand new motherboard, GPU, upgrade Ram and CPU and as well get a better cooling supply all together. This Dell Optiplex 330 runs pretty slow currently with Linux Mint cinnamon 17 installed. I want to put windows 7 or upgrade to 8 and would it work for me to get a AMD processor 64 bit and what hardware would fit this case and still keep me in a budget around $450-$550