thanks for the quick reply chuck, sorry that i didn't include this in the original post but I don't have v-sync turned on. I find that it normally does increase fps without any noticable artifacts.
The X300 is oc'ed which helps on the fps, but i only get 91 on max on return to castle wolfenstein and quake 3, the others will on low quality.
The question still remains b/c i am sure that v-sync is off and i have never gotten over 91 on any openGL game, if i run unreal 2003 (a directX game) i can get well over 100 fps on low quality so i know it can do it. thx for any info