Gotta work the DIP switches. Hope it works, FSB can't be selected through these. 🙁

See page 12:
https://theretroweb.com/motherboard/manual/ft … dc271854843.pdf

If you need more speed, you could find a CPU with L2 cache. Mendocino, Klamath, Deschutes, Katmai....

I just want to run my Covington at 100mhz fsb.

Either using mobo settings or some pin hack.

Appears there is no cpu clock jumper/switch, only multiplier switches. Does the BIOS have a bus speed setting ?

I've had success using a utility called SetFSB (https://www.majorgeeks.com/files/details/setfsb.html) on a 440BX motherboard without jumper or BIOS settings.

Most of those CPUs that I've seen are only 66FSB, if I recall. I have two Celeron Slot1 CPUs and they both are 66Mhz. What is the CPU model (ex. SL27Z). Do you have 100Mhz memory installed? You may be trying to overclock, which might require some wizardry (and 100Mhz memory) to work.

This quip from the manual seems to know:

Assuming this is the correct manual. It's always nice to see your actual board and setup, to make sure we're all looking at the correct board.

It'll be way easier to acquire a Pentium 2 or 3 100FSB than to try and force 100FSB. Kinda high-level overclocking. Like trying to overclock a coppermine. Not really do-able.

Seems like a similar situation as with the intel SR440BX motherboard here:
My Post from Sat 31-3-2012
Intel-built 486/Pentium/PPro/PII motherboard guide

Solved!

Just taped pin B21 and whola.

Thanks!

Great! 400 or 450 MHz?

Was 300mhz, now is 450mhz.
Quake benchmark literally sped up by %50

If you get a slotket with voltage settings and 100Mhz jumper you could use Mendocino at 100Mhz FSB. It should be much faster as it has L2 cache. You would need a couple of Mendocino 366 to be able to select one that runs at 550Mhz stable. It is the fastest CPU you can have on that board.

PlaneVuki wrote on 2025-06-28, 09:16:

Was 300mhz, now is 450mhz.
Quake benchmark literally sped up by %50

Makes sense, both cpu and fsb speed is increasing by 50% 😀

Good thing you found the B21 trick, I was gonna search for which pin to tape up, since it seemed to be the only way for that board ..

AlexZ wrote on 2025-06-29, 11:59:

If you get a slotket with voltage settings and 100Mhz jumper you could use Mendocino at 100Mhz FSB. It should be much faster as it has L2 cache. You would need a couple of Mendocino 366 to be able to select one that runs at 550Mhz stable. It is the fastest CPU you can have on that board.

Well, 366 Slot1 Mendocino does exist, but yes, the 370 are much more plentiful ...

Oh the days, running dual 366@550 on an Abit BP6

Pro:
Yes, Covington Celeron easily could be overclocked because it had no external cache.
Same with Mendocino Celeron. Its FSB overclocked resulting from 300 to 450 MHz, capable of SMP (multiprocessor) was the fastest x86 processor. At same clock even faster than the contemporary Deschutes Pentium 2 450 MHz because of its faster L2 cache.

But:
A Covington still remains a lame duck.

Disruptor wrote on 2025-07-02, 14:42:

Pro: Yes, Covington Celeron easily could be overclocked because it had no external cache. Same with Mendocino Celeron. Its FSB o […]
Show full quote

Pro:
Yes, Covington Celeron easily could be overclocked because it had no external cache.
Same with Mendocino Celeron. Its FSB overclocked resulting from 300 to 450 MHz, capable of SMP (multiprocessor) was the fastest x86 processor. At same clock even faster than the contemporary Deschutes Pentium 2 450 MHz because of its faster L2 cache.

But:
A Covington still remains a lame duck.

For most purposes, yes the Mendocino will outperform the Deschutes at the same clock. But for some applications, using large datasets, the P2's slower, but 4x as big cache, pulls ahead. But that's pretty much more of a theoretical advantage in terms of retro games 😎