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Can i unlock this Pentium 3 cpu..

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The only thing you can do with those is modify default voltage and FSB by pin taping.

Since it's an early, Katmai PIII then you might not have any luck with that. They ran too hot to overclock much, you'd be lucky to run it at 133, but it has been done. Coppermines were a lot more tractable.
 
Yeah, you can't change the multi. I still have a P-III Katmai 500 running at 5x112~560. I'm not even going to try for any more.
 
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