My motherboard can take two Xeon chips. I apologize for troubling this community, but would appreciate the help.
It's no trouble - but all I can tell you is that you need to verify with HP that this processor is supported by their board. In order for a particular processor to be used, it has to be socket, board and BIOS compatible.
Thanks so much. I had no idea about checking the bios for compatibility! Your astute observation may have saved me much grief! Thanks again.