Wow, what a board. 600Mhz is max or you didn't try?

When I messed up the OS trying to make 600FSB fairly stable I changed to a different system. 600 was boot stable, FYI I will test more later, of course.

Thanks for the info. It's rather rare board, the only one good result on it that I know it's youngpro's 2001 at 647FSB. All other you see in rating below They are no good and I know people struggled even at 550-570.

Very nice! What was the nb volts?

I don't remember the Nb volts, not dangerously high - that's for sure (I was just testing, not trying to kill it). 1.5v tops. Anyway, it took a fair bit of work to get there - the clock amplitudes helped me quite a bit, and of course messing with GTLs