Gentlemen,
Several weeks ago I upgraded CPU from Celeron 333 to PII 450. I cleared CMOS before booting,
and reset bios and everything booted up fine and new CPU was correct.Here's the problem,(i'll try to keep short) when I shut down computer for the night and restart
in the AM, defaults back to 300mhz and 66fsb(cmos still set to 100fsb 4.5x 450mhz 
I can let it boot to windows (safe or regular)and then go to full shutdown, turn power off and
then reboot and it boots up right PII 450mhz 100fsb:-)
My System:
PcChips M748MR (on board sound and video)
W98SE
224mb sdram
3gig Segate HDD
Here's what I have done thus far:
Updated W98 with all patches and security updates
obtained and flashed most recent AMI bios from PCCHIPS (990702S)
System runs superb after I reboot, and I can go through restarts and shutdowns throughout the day
and sys will always resume 450/100