Not that I have ever tried, but I was under the impression that 133 FSB CPUS will work with 100FSB mobos... providing the bios and VRMs are compatible with the CPU. Are you sure those are the correct VRM's for the CPU's?

[EDIT:] Ah ninja'ed by slivercr ... heee yaaaa.... 😵

Yeah it's mostly for price reasons, tyan/super micro bords are highly overpriced on eBay. Same goes for the 1ghz/100 piii. I somewhat like to go for less-hyped things, it's not really a money problem I could afford them. I already planned to run my 133 piii at 100 when I bought this motherboard so no problem.
My Fujitsu is a BX440 board. And it Does support coppermines, just seems to refuse booting with 133mhz CPU cpu instead of running them at lower speed. Maybe it's because they strictly follow specs instead of being more tolerant and compatible

spiroyster wrote:

Not that I have ever tried, but I was under the impression that 133 FSB CPUS will work with 100FSB mobos... providing the bios and VRMs are compatible with the CPU. Are you sure those are the correct VRM's for the CPU's?

[EDIT:] Ah ninja'ed by slivercr ... heee yaaaa.... 😵

If I were you, I'd first try to locate another 650 MHz cpu to check the VRM you bought works properly.

The vrm should be ok : uses a HIP6004CB chip which has a 1.3 - 3.5V range : https://www.intersil.com/content/dam/Intersil … ip6/hip6004.pdf

I tried to swap positions (between the 933/133 and 650/100) and the Mobo boots correctly no matter which cpu use the vrm board I added

I just found a katmai PIII 500mhz/100 in another computer, i'll try with the 500 + 650 this evening, we'll see if the problem is really the FSB (not sure i can mix katmai with coppermine though... but i may have a chance since the vrm are independant)

slivercr wrote:

There are a few versions of the MS-6905, I've worked with version 2 quite a bit. They feature a linear regulator to take the 5v coming from the slot and turn them into 2.5v to feed CuMines (pin Z36). The IC is a TVC16222, a 22 bit voltage clamp. It takes various APIC signals from the slot and lowers their voltage for use on the socket.

Are there any slockets which have the voltage clamp and a voltage regulator? I have two Powerleap PL-Neo/T, which are Tualatin adapters, that I would like to add to the slockets, but I'm not sure if my motherboard will go down to 1.45 V. PIII CuMine's run at 1.65 - 1.75 V (I think).

feipoa wrote:

slivercr wrote:

There are a few versions of the MS-6905, I've worked with version 2 quite a bit. They feature a linear regulator to take the 5v coming from the slot and turn them into 2.5v to feed CuMines (pin Z36). The IC is a TVC16222, a 22 bit voltage clamp. It takes various APIC signals from the slot and lowers their voltage for use on the socket.

Are there any slockets which have the voltage clamp and a voltage regulator? I have two Powerleap PL-Neo/T, which are Tualatin adapters, that I would like to add to the slockets, but I'm not sure if my motherboard will go down to 1.45 V. PIII CuMine's run at 1.65 - 1.75 V (I think).

The Powerleap PL-iP3/T: http://www.powerleap.com/pdf_files/PL-iP3T.pdf

Cyrix200+ wrote:

The Powerleap PL-iP3/T: http://www.powerleap.com/pdf_files/PL-iP3T.pdf

Well, anything except the Powerleap ones. I had two of those when they just came out and tested them for Powerleap. They sent them to me for free. They ran fine, but started crashing every 5 days or so. After a month of frusturation, I determined that one of the fans would stop running and the CPU would overhead. The issue was that they had quality issues with the fans. I don't know if they ever resolved it. Some motherboards have the slots pretty close together, so you don't have much room for heatsink+fan. Anyway, I sold them for $150 each back in 2006 before I moved. I kind of wish I had kept them. I recall there was a model which was intended for dual CPU support and that is the pair I had. They are difficult to find now days.

This is my usual go-to page for looking up processor upgrade info:

http://www.cpushack.com/UpgradeProcessors.html

though it doesn't seem to list the PL-iP3/T.

I've had to replace the fan on one of my Powerleaps, the original got damaged in the post.

Updated the bios. (hard to find, the D1031 mobo reference show only the user manual on Fujitsu website, i had to find that this mobo came from a Primergy 470-20 server THEN it would show some bios updates for download).

Unfortunately, despite the fact the last bios added cC0 coppermines support, still no boot with two PIII 933/133.

I tried the FSB mod, covering B21 to make the mobo think it's a 100mhz fsb cpu (Intel datasheet says it can be grounded or left unconnected). It seemed to work since it goes through some more steps (leds on mobo showing things instead of nothing before), but instead of the POST beep i get a beep code and the display stays black.

Beep pattern : 1-4-3-3

This pattern seems only known for Phoenix bioses, it means "Autosize cache.". Ehm, what's that.

Maybe i'm out of luck with this mobo 😒

Have you tried with a single FSB modded PIII 933 just to rule out issues with the extra VRM module or one CPU beeing faulty?

okenido wrote:

Updated the bios. (hard to find, the D1031 mobo reference show only the user manual on Fujitsu website, i had to find that this […]
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Updated the bios. (hard to find, the D1031 mobo reference show only the user manual on Fujitsu website, i had to find that this mobo came from a Primergy 470-20 server THEN it would show some bios updates for download).

Unfortunately, despite the fact the last bios added cC0 coppermines support, still no boot with two PIII 933/133.

I tried the FSB mod, covering B21 to make the mobo think it's a 100mhz fsb cpu (Intel datasheet says it can be grounded or left unconnected). It seemed to work since it goes through some more steps (leds on mobo showing things instead of nothing before), but instead of the POST beep i get a beep code and the display stays black.

Beep pattern : 1-4-3-3

This pattern seems only known for Phoenix bioses, it means "Autosize cache.". Ehm, what's that.

Maybe i'm out of luck with this mobo 😒

Watch out, B21=BSEL0 and A14=BSEL1.
Did you try the CPUs without pin modding after flashing?

The PIII 933 are working properly i have tested them on another motherboard.

I'm not as confident about the VRM module, what makes me think it works is the boot sequence showing "2 CPU installed". But strangely, it shows only the name/frequency of the CPU installed in the first slot (because it expects two identical cpus ?).
The second CPU (which is using the VRM board) is much cooler than the first. Like it's idle or something. It's not completely cold, it's powered in some sort of way.
I don't know how to check if its' really working as expected, maybe the BIOS just uses a single CPU that could explain why the second is not as warm..

Working setups : (by working i mean it POST)
two PII
a PIII coppermine 100 + a PII 100 (no matter which slot)
two PIII coppermine
a coppermine and a katmai

Not working setups :
anything with a 133mhz fsb cpu.

Interesting facts :
- when the PIII 650/100 is in the first slot and the 933/133 in the second, i get display, memory test and scsi ok, but beep code and freeze in place of the POST beep/
- when i swap those two cpu (650 in the second and 933 in the first), i got NO display and directly the beep code.

- the mods seems to have no effect (tried A14 and B21 since i got confused at some point 🤣 ), i removed them and I still have the beeps, strangely i can't boot with the 650+933 like before the bios update, it just beeps and no display

EDIT:

The VRM definitely works... I tried a Katmai 500 in the first slot and the Coppermine 650 in the second, the boot sequence showed the info from the second (vrm-powered) CPU :

Katmai was ignored ("1 CPU installed')

I guess we just can't force this mobo to accept 133mhz fsb cpus... time to think about getting high frequency 100mhz fsb cpus, which are rare and expensive, or getting an easier mobo

It should work with matching 100 MHz FSB CPUs. I still suggest tracking down a matching pair to try out the config.

The VRMs must not act independently as you thought: CuMine + Katmai powered the lower voltage cpu only. Does the same happen with CuMine and P2?

Just use some brands like it is here the Gigabyte board, bcuz the OEM ones are not the best solution, as they are locked up on the bios, and they are not flexible at all.
But in some cases the OEM can do the trick, but some of the times when i found whole OEM machines i just remove the OEM mobo and install parts that i can configure and settle up in the BIOS...