We have a HP Proliant DL360P with one Intel Xeon e5-2650, and we was in need to use two Xeon e5-2670 V2, this server by default this G8 did not recognizes the v2 processor, so we found this procedure so we did the BIOS Firmware update to most recently (2014) and after we did the processor self-upgrade procedure as described on the link.
Changed the processor and it worked, and after a power-off / power-on it did not booted, in the SID panel it said that the processor was the fault, so we changed back the processor to the e5-2650, and it keept saying that the processor was the fault.
We removed the batery to clear the BIOS and after it botted but appeared a very mess strange characters in the display.
I'm now downloading the Firmware maintenance v10.1 from FTP of HP to make the procedure described here but I want to check with you if with your knowledged if you now something about it