Fixed, https://forums.mydigitallife.net/threads/award-ami-bios-mod-requests.5863/page-3066#post-1439683 (upgrade to official F25 bios, reboot, then flash modified bios from pure DOS with Efiflash.exe inluded)
I've had it before, and now I remember what it is (flash utility version). The old man's memory is full of holes :-( My mod matched byte-to-byte :-D Thanks!
v.3.90 bios done here https://forums.mydigitallife.net/threads/award-ami-bios-mod-requests.5863/page-3259#post-1595443 (mod can be flashed with SPI flash programmer only - as here