well I love the game doom 3, i get anywhere from 1-20fps....60 when i stare at a wall in the game. The problem begins when a monster shows up....from a nice 30fps it drops to 5 and it lags so bad. I know its a graphics card problem because this game requires 64mb and my iBook only has 32, but I know that a few extra mhz to the CPU will make it at least 3-10fps faster. Thanks!