I did. HP told me that the CPU I bought would load without a BIOS update. In this they were incorrect. I have a friend who is very good with his hands, and he managed to unbend the pins on the stock CPU enough to put them in the socket. We fired it up and got the computer to boot, at which point we flashed the BIOS and installed the new Brisbane chip. It works fine now. Therefore, the 5600+ CPU is compatible with the motherboard.
Edited by Danja, 13 July 2010 - 12:32 AM.