Cel566 runs @100Mhz only!

NismoSST

Junior Member
Jul 19, 2000
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This is my first post on this fine forum so bear with me please!
I've just got my hands on a Celeron566 and have overclocked it to 850Mhz no problem. What puzzled me was that it wont run with a FSB other than 66Mhz or 100Mhz. I'm not complaining but is this unusual? I thought it might do 75 or 83 before it did 100.
Cheers for any info.