I would check that the BIOS is current, and see what the manual notes for jumpers (if any.)
The usual is that the settings are incorrect. Since there was no make/model supplied, then you just need to read the manual on what to set for this CPU.
An out of date BIOS will mis-report the CPU so if you have such an issue, fix it.
Bob
The Athlon XP 2800 should be runnin at 2.8gig but is posting at 1245 and system properties also shows it at 1.24gigHz. Seems I'm missing a change on the Mobo or something? Thanks

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