You will have to contact the manufacturer of your system and ask what processors are supported by THEIR BIOS. Any upgrade must be SOCKET and BIOS compatible.
Also, the manufacturer can tell you if your system provides sufficient power and cooling for any upgrade.
Personally, with such an old system, I would not bother upgrading it. Spend your time and money on a new/current system and save yourself a lot of frustration. Just my opinion.
This message was posted on behalf of Intel Corporation
Thank you very much to Al Hill for the information provided above.
I hope the information posted previously was useful for you, because that is the best thing to do when you are trying to do a upgrade, to get in contact directly with the manufacturer of your system, so they can further assist you.
In regard to the s-spec inquiry, on the following link you will be able to see all the information about it:
And about the question of the stepping, on the following link you will be able to find the explanation:
Any questions, please let me know.