I soldered back the reprogrammed Main BIOS flashrom to restore the old BIOS from UEFI, then used ALT+F12 to copy Main to Backup…
>MeatWar, could you point me to mentioned microcode v19h? The closest I have is 17h and 1Ch (original BIOS contained 0Ch). I don’t want to use the latest with spectre&meltdown workaround as it may have a performance hit… From this point the 1Ch from 2015 should be still OK.
Well, found it in archive here: [OFFER] Intel CPU Microcode Archives