It's an extremely middle of the road set up by today's standards which should easily be built for under $1000, OS included and should allow you to play any current game at high settings at max resolution on a 19" screen at around 30fps, give or take a few frames. Any game meaning Crysis/Warhead/FarCry2.
Keep in mind that mid-range applies to current new build standards. That set up would have been considered mid-high range performance over a year ago.
2x2GB of faster RAM (DDR2-800 preferably DDR2-1066 if your MoBo supports it) probably would have been a better choice for gaming though. That's your current bottleneck.







