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I had a Cyrix 300 in my first machine, and I believe the multiplier is locked. It's been a long time, and I never got it higher. Bump up the FSB and voltage. Have fun...
Your Cyrix 333 is probably running at 250MHz ...either 3*83 or 2.5*100.....The multiplier shouldn't be locked......The best I could stably do for my old pr 333 (250=3*83) was 4*66 or 266MHz but because the bus speed was that much lower the whole outcome was slower. I did get to 292 (3.5*83) but wouldn't get into windows at all.....make sure you've got reasonable cooling...any of the new celeron/duron hsf's should be OK.
You will need a mobo that will let you fiddle with the fsb and multipliers...probably by jumper given the vintage......and they probably won't be documented that well either.....
Have a look at Motherboard.org for your model and see if you can get the mobo jumper specs from the manufacturer's site....
I had a Pentium II 333 slot 1 and I got it overclock to a 400mhz. It had the clock-lock on it. I wish it did'nt. Now I have my 866 with the same board.
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