I'm running Win98SE on a ABIT KR7A-Raid with an AMD T-Bird (1.4G) and 512M of CAS 2.5 PC2100 (Crucial). My system seems pretty stable up to 1.47G (anything over that and it won't boot, or will restart), yet so far 3DMark and UT both crash haflway through were as prior to this they were working fine. This being a decent set up I have to think its the OS that's for some reason having problems, so I: Do certain OS's operate better in overclocking?