@newguy2intel
Unfortunately you are out of luck. It is not just a microcode update. ME also needs updated (which we can do), but the board will not post with an ivy bridge cpu without updating a number of bios modules (which we likely can’t do without manufacturer support).
I was not able to get this to work on mine, and @Lost_N_BIOS has tried multiple times with this series of motherboards (DX79 - SR / TO /SI).
Unlike the third party manufacturers (ASUS, ASROCK etc) Intel abandoned their consumers on this series of boards.
Your best option is to try and on-sell either the motherboard or cpu.