[weblacky]

Just a random bit that I recently went through -- I picked up a Fuel that the owner said was 600 MHz.  hinv in both PROM and IRIX said 600 MHz, however during PROM boot, a warning that looked like this showed up:

*** Module 001c01 CPU configuration values mismatch.

The CPU configuration values from board EEPROM/PSC did not match
on 1 module(s). Please reflash the PROM image on the above listed module(s).

I eventually did a "flash -o" from IRIX and the flash process picked up and showed a 700MHz speed; on reboot, the Fuel came back as 700MHz.  So, up-clocking should be automatic via "flash -o", and hinv values seem to only report what is stored in PROM, not the other way around.

If someone is able to downgrade a working Fuel to a slower speed, it might be useful to grab a dumb of the nvram before and after, to see what's changed.  But I don't think this is in the nvram, as I have a bad timekeeper module and nvram changes don't survive (they're always reset back to default values).

So to confirm, your system was totally usable, other than the PROM notification, and booted Irix just fine and all that with the lower speed settings?

That sounds like what I was told, way back (but never told of PROM warnings).

Thanks for posting!