Maybe with an Engineering Sample PII, though I've never come across one. You can use 50x2 instead to get 100MHz with boards that support such FSBs and unlocked PIIs.

No, I have some CPU's here that support this feature.

All Klamath do that 133-233, 133-266, 133-300, but you cannot overclock them. my current mainboard can go from 2x up to 6x, which means 2x66=133Mhz as the lowest frequency. According to some other infos, I can go for a dA0 PII, which means 133-333. That would be a VERY nice retro-machine and if I can go for 1.5x with the SR440BX , I can start from around 100Mhz up to 333 Mhz 😀

With this PII and only half TDP then the Klamath that would be buy far the better choice, then a K6-III+, because the FPU on the PII is a killer.

This is a nice little mainboard, but the multiplier and FSB options are pretty useless.
Read SR440BX review on vogons, in particular the section "Newspeed". AFAIK the NewSpeed tool is the only way to poke the multi a bit on this motherboard. The BIOS itself has no such options.

AFAIK 1.5x multi on a Pentium II is a myth. The only 100MHz Pentium II benchmark I have is one running at 2.0x with a 50MHz FSB speed.

I am currently running a PII-300 between 133-300Mhz by changing the Bios values on the board.

gerwin wrote:

This is a nice little mainboard, but the multiplier and FSB options are pretty useless.
Read SR440BX review on vogons, in particular the section "Newspeed". AFAIK the NewSpeed tool is the only way to poke the multi a bit on this motherboard. The BIOS itself has no such options.

AFAIK 1.5x multi on a Pentium II is a myth. The only 100MHz Pentium II benchmark I have is one running at 2.0x with a 50MHz FSB speed.

Not lower then 233 ? That's useless for me.