I have a autistic brother and my parents want to keep him entertained. We have a old computer that still runs and i wanted to know what is the best sub-$100 card we could put in it with out bottlenecking. It is a pentium d at 3ghz and has 2gb ddr2 ram. He plays mostly ea-sports games and a couple sim games, and etc. the monitor resoultion is 1024x768 and also it has a 430w psu.