It's not running as efficient as it could be. Your RAM is bottlenecking your CPU. OC the RAM (if you can) from 133 to 166 and obtain a 1:1 ratio, or the best way is to get some PC3200 and underclock it to PC2700 speeds. When you underclock RAM that's say PC3200 and is 2.5-3-3-7 chances are you will be able to run it at PC2700 speeds at 2-2-2-5 timings like high performance RAM except much cheaper obviously...then you still have PC3200 RAM for the future.