Quote Originally Posted by some_one View Post
I think if you read the first page notes on the official BIOS thread you could easily be lead to thinking that.

Microcodes are temporary, and have to be loaded** each time you power up the CPU. They don't change things irreversibly.

By HW I think you mean FW (Firmware). The BIOS is the firmware and every BIOS change is a firmware change although there are modules within the BIOS that are firmware in their own right and may or may not be different from the previous BIOS release.

I can think of no reason for the downgrade to work any differently than it did before, however once the new Rev 3.0 boards come out that may make a difference. That is if it is still possible to downgrade to currently released BIOSes.

If the older BIOS will refuse to boot due to the B3 stepping being unknown to it then I would hope Asus has made a new ROM ID to reflect the stepping change as this will be a hardware change. In this case Asus would start afresh with a new series of BIOS ROMs hopefully sorting out many of the previous problems. we should find out soon enough. In the meantime I would advise against trying to downgrade the new B3 stepping boards with B2 stepping BIOS.

**technically microcodes updates don't have to be loaded at all but they are there to fix errata so are generally a good idea.
Whatever you call it, micro code, HW, FW. None of those complex stuff can explain the simple fact that you can't downgrade from 13xx to 12xx in a usual and straight forward way, according to yourself.

You, yourself have been providing a modded 0804 BIOS, and you have been describing an unusual proses for downgrading, but now you are saying "I can think of no reason for the downgrade to work any differently than it did before" ?
It was different, according to yourself. Has anything changed in 13xx since you provided modded 0804 BIOS or your view has changed?