|Thanks for the repsonses.|
This is ridiculous. Jumpers don't magically change on their own...they have to be moved.
So if you didn't tamper with them before this problem, there was no reason to tamper with them after the problem began.
The only logical explanation is the CMOS battery.
And since you flashed the BIOS, the settings need to be cleared & then reconfigured from scratch.
If you're not willing to accept that, we can't help you.
I am not sure how to make this any clearer Jam:
The PC is ignoring both the CMOS and MB jumper settings and booting up at 100MHZ regardless.
The MB battery and the BIOS is saving other changes (time, LAN on/off etc) but seemingly ignores any reference to the clock speed.
Anyways, thanks for the help everyone. I will continue to mess with the BIOS.