Thanks Thug, I made a full post on my system. I tried 1:1 at 133FSB, but never got to the BIOS, of course the Vcore was at default. When this happens I have to unplug, opon the case and jumper to clear the BIOS. What a pain. At this point I'd be happy at 2.3Ghz, 2.4 seems too high.