By full HD I presume you mean you have a 1920x1080 monitor. That MB (AM3 socket) is about at the extreme as to the processor it can use. A Phenom II X4 980BE or 1100BE may get you a bit more oomph, but the gfx card would be the best way to improve gaming performance. You could move up to an R9-280/280X or GTX 760. Anything more powerful and CPU bottle neck will start wasting your money.