I found no understandable informtion at: https://downloads.dell.com/FOLDER03808343M/1/T20_BIOS_A09_Release_Note.pdf

Now I just use Windows (not Linux).  I know there is a term "CPU microcode". Will "CPU microcode" prevent me from upgrading T20's G3220 CPU to  E3 1285L V3?

Thanks a lot!