MS-6533 FSB won't change

aztec321

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Apr 20, 2008
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When I go to the bios, I change the FSB from 100 to 133 and I reboot.

However it is still recognized as 100 mhz even though it says 133 mhz in the bios.

The motherboard is old. The bios is old too - newest one is from 2002, which I am confident that I have.

What can it be?