Tech-Hounds finished an article exploring what can we do to avoid lag, stuttering, and performance - memory wise.

At one time or another, all of us have complained of too low or choppy frame rates at least once when we're playing games. Low frame rates can be detrimental to the gaming experience, particularly if it happens at that critical moment when you've lined up for a frag and got fragged instead by the one on your crosshair. Naturally, we don't want any lag when playing games, so what can we do? A lot actually, but we must know what cause these problems in the first place.

Quest for Lag Free Gaming