So ive had my pc for a couple years, and even then i watched an old build guide (oops) but im running an amd athlon x4 760k with 8gb ddr3, and an msi r7 250x gpu. I really only play csgo and im on a very tight teenage budget, im looking to upgrade the cpu and mobo and possibly find a used gpu on ebay, any suggestions for the cpu? dont have a set budget just as inexpensive as i can get away with and i can make it work