I have this problem also. I know I may sound really stupid (I know very little about game development) but is there not some way to separate the movement of the mouse from the other game graphics? I've played many games where lag effects the mouse (and which positively irks me) and other games which maybe lag a bit but keep mouse movement smooth (which is a very nice feature). I feel like as a gamer, one of the most important aspects is to keep the mouse fluid because the player directly controls it and having it lag or lock up can be extremely annoying. Anyway that's my 10 cents (or is it 2?), sorry to be so annoying.