I have documentation for my P2-350 which shows a dip switch for setting the CPU op freq. However, I have an IBM Aptiva 2139-E5U with a IBM V66AX mobo. I can not change the CPU freq and the FSB is set for 100Mhz (the highest setting on the mobo). I have seen people claiming overclocks of up to 520Mhz with the very same CPU. Is there anything I can do other than replace my mobo??