You might want to think about updating that, unless you're only looking to browse the internet with it or something.
Many games run fine. Blockland runs at a good framerate, NFS runs at a good framerate and so does Pac Man world 3, GTA IV, PWO, etc. I'm worried to get a new PC that I'd get used to high speeds. I have a friend that had a PC with worse specs than mine, he got a brand new machine with Intel i7 x64, 16GBs of RAM, NVidia GTX 780 2GBs vRAM and he runs games at around 80FPS. When he used my PC, he got pissed off in seconds.