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Downgrade MEI firmware how?

PanosXidis24
Level 11
Hello guys im on X299 system i need to downgrade MEI firmware like 11.10.0.1287 from the new one!!!how??thanks
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3 REPLIES 3

restsugavan
Level 14
MEI Firmware always did not affects system performance. It was provide more security and protecting against backdoor or root admin attack via USB ports.

By the way if you want to flash older version of MEI Firmware. You can use this command via FWUpdlcl64 Tools.

C:\> FWUpdlcl64 -F "XXX.BIN" -ALLOWSV then hit enter.

Note :: "XXX.BIN" = your old MEI Firmware binary file.
W11 24H2 26252.5000 Core i9 7980XE 02007108 MCE ME 11.12.96.2535 R6E Modified BIOS 4001 SAMSUNG OG9 FW 1019.0 SSD 970 EVO PLUS 1 TB x 3 NVIDIA RTX 4090 GAME READY 560.70 64GB GSKILL DDR4 3200MHz JBL 9.1 Sound Bar DTS-X

PanosXidis24
Level 11
Error 8714: Firmware update not initiated due to file open or read failure

PanosXidis24 wrote:
Error 8714: Firmware update not initiated due to file open or read failure


If the option -ALLOWSV not work. You can try second BIOS option on the last page of BIOS menu.

It may help if your board still had initial BIOS version on it.:o

The ME of second BIOS may still the version that you want. :cool:
W11 24H2 26252.5000 Core i9 7980XE 02007108 MCE ME 11.12.96.2535 R6E Modified BIOS 4001 SAMSUNG OG9 FW 1019.0 SSD 970 EVO PLUS 1 TB x 3 NVIDIA RTX 4090 GAME READY 560.70 64GB GSKILL DDR4 3200MHz JBL 9.1 Sound Bar DTS-X