Memory qeustion

Is 2GB more then enough? How great will my perfomance in games increase when I get 800MHz instead of the 667MHz? Does it really matter? Because if it does't I'l get the cheaper 667mhz module.

Don't listen to critical about needing an extra gig. I almost did, and then I found out all I needed was a good video card to run my games.

Yes, 2 gig is enough.