You could always try a different slotket.

Given that the board says it supports up to 1000MHz, it may also mean it supports up to a 10X multiplier. It appears to match the symptoms as 1100/100 (11X) doesn't work, 733/66 (11X) doesn't work for long, and neither does 700/66 (10.5X).

sounds like a voltage issue - works with lower frequency at same multiplier but not stable. i would suspect, that the slotket doesnt manage the voltages in a form, your supermicro needs.

jheronimus wrote:

[...]

SL5ZE 1100A/256/100/1.475 (Celeron) — didn't POST (with TUSL2-C it starts up and freezes at my Voodoo 5's boot screen)

As the slocket is FC-PGA1, not FC-PGA2, this was to be expected. You'd need to mod the slocket to get this to work, regardless of the motherboard.

jtchip wrote:

Given that the board says it supports up to 1000MHz, it may also mean it supports up to a 10X multiplier. It appears to match the symptoms as 1100/100 (11X) doesn't work, 733/66 (11X) doesn't work for long, and neither does 700/66 (10.5X).

Technically this sounds unlikely as non-ES Coppermine CPUs are all multiplier-locked, so they ignore whatever multiplier setting the board tries to feed them. However some boards refuse to boot at all if they don't recognize the CPU correctly. No idea if the P6SBA shows that behaviour but it could explain it.

However in that case 11x 66MHz would also fail to boot completely. If it starts up and freezes, it's not the board refusing to boot, it's passed that hurdle and is actually starting to do something, just failing at it. The P3-1100 is rated to run at 1.75Vcore. What voltage is it actually getting according to the PC Health Status in BIOS? Try feeding it 1.8V or 1.85V.

Probably a better slotket might yield results - seen a post on another forum where the v2 P6SBA posted OK with a Celeron 1400 and an Upgradeware Slot-T, although the cpu string was wrong and it only showed as 1GHz (a bios 'hard' limit at x10 multiplier maybe?)

It's just weird to me that P3B-F was able to boot with the chip, but this board wasn't. The P6SBA is a pretty late board, so the main difference seems to be that P3B-F is jumper-free and has Award BIOS (instead of AMI WinBIOS). So from your answers it looks like I have these options:

- get a Slot-T adapter. Of course I'd very much like to own one regardless, but they are fairly rare and expensive;
- get a 1000/100 Coppermine. Don't see one for sale, but S370 chips seem to be a lot easier to find than, say, Slot1/100 chips;
- get a Slot 1 chip with 1000/100 settings. Haven't been able to do so for quite a while, which actually drove me to testing this 1100/100 chip;
- get a different motherboard. I really like the Supermicro board for having three ISA slots and I imagine that most other Coppermine boards will have two slots at best.