Is there no setting for anything lower than 350mhz and higher than 300mhz? Try that... As for the processor itself, some processors have good yields while others do not. For example, I have a beige G3 266mhz and I can clock it to the maximum of 315/70mhz, tho not that stable, I am at 300mhz supser stable. My friend, however, with a desktop beige g3 266mhz (mine is a minitower) got his processor to clock up to 366mhz! (running at 333mhz stable) He must have gotten a great yield... so this is one thing to consider.