Pavilion a1540n does not recognize new CPU?

I bought an Athlon 64 x 2 5000 + to upgrade my CPU based on a recommendation here, but the computer just said "unknown processor" and has the speed set at 1000 MHz. The place where the CPU is identified in BIOS is greyed out, so I can't type in the correct processor. Can someone tell me how to make the computer either correctly identify and use this CPU?

The CPU can be mislabelled. Can't go back you?

If you want to see the differences between Brisbane and Windsor family of AMD processors, go to AMD or WIKIpedia site and make a comparison between them

Tags: HP Desktops

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