I have to under-clock my Amd Athlon xp 2800+ (barton core) its stock Front Side Buss (FSB) is set at 166 and the multiplyer is 12.5. I have installed everything correctly all drviers when i go to play any game i get blue screens,quits game automaically,resets. I fixed this but i had to under-Clock my FSB to 160. Why do i have to do this to get it to function correctly Cooling is not the problem as i have 5x90mm case fans 1800rpm-3000rpm. Any Suggestions ?