alot don't work on 266FSB timings. 333 is fine, but I like266/400fsb/1000mem, and is currently hard to get stable. Secondary timings have to be set far too loose, and voltage far to high...I can pop everything in P35 and other and have no issues...

I mean, really, this chip is different, maybe these speeds don't work, but I get higher FSB on 266 than I do on 333 on all other boards for some reason, with elss volts.