Slomo... speed problem

hey guys, i run winXP, it's not vista, so you should know before thinking something that it's uncompatible
Ok, here I go:
When I run Deus Ex normally, the title screen opens and my FPS is (i seen it with fraps) at 550-1000. i mean, wtf??
when I start up my map in UnrealEd, and go to Test Map, the speed is 450-600 FPS. I think this has nothing to do with slomo, -- I said I THINK it has nothing to do, not that I know
Ok, here I go:
When I run Deus Ex normally, the title screen opens and my FPS is (i seen it with fraps) at 550-1000. i mean, wtf??
when I start up my map in UnrealEd, and go to Test Map, the speed is 450-600 FPS. I think this has nothing to do with slomo, -- I said I THINK it has nothing to do, not that I know