Downgrade Intel ME Firmware?

[geneo]

I use the intel MEInfo tool:


Intel(R) ME code versions:
BIOS Version 2403
GbE Version 0.4
Vendor ID 8086
MEI Driver Version 2145.1.42.0
FW Version 14.1.65.1969 H Consumer


Security Version Numbers
Trusted Computing Base SVN 1
Minimum Allowed Anti Rollback SVN 0
Image Anti Rollback SVN 11


It's the ARB (Anti Roll Back)

[geneo]

I apologize for a probably very dumb version, but how do I know/find this security number? For instance, is it the same between 14.1.53.1649 and 14.1.65.1969? If yes, how do I downgrade? I've got a Z490. Thank you

p.s.

Attachment 93140


Should I compare TCB or ARB? Or both should match?

Have you flashed 14.1.65.1969? There are some issues with it, but they can be worked around. I tried to roll back to 14.1.53.1649 and it was not permitted.