heck Quake can run 20fps in some areas where there's not a lot going on. I'd say I was averaging 7-10fps at 160mhz though... slow as that sounds it IS playable and enjoyable, I was playing it a lot until I got kinda far and found that the save states don't work past level 2 (I think it's level 2.... at any rate they stop working after a certain level). Starting over every time sucks.