You should be able to use any P4 with a 400Mhz bus, the chances that you can use a 533 or 800Mhz bus model are slim. If this is a
laptop you may not be able to upgrade at all.

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"Msgri1" wrote in message ...
I have a Compaq Presario desktop PC with the 2.6 ghz Celeron chip. Can anyone
tell me if I can replace the processor with a Pentium 4 using the same socket?

Thanks