Never mind, the C003-HOT works fine with the thing so I guess my Rev 2.3 MS3605 just hates me ; v ;

I have rev 1.5 of that board, and Celeron 1.4 Ghz in slotket works like the charm. I have powerleap adaptor. MSI Master slotket works with coppermine, but not sure with tualatins. Maybe after some modifications. With Powerleap adaptor, the board should work with Tualatins.

Hey TehGuy, this might be helpful.

See this thread - Tualatin on GA-BX2000+ / SlotT

My reply on there :

"have the same issue on my GA-6BXC Slot 1 board with MS6905 Adapter when using one of the modified III-s 1.4 Tualatins. Certain Tualatin compatible BIOS might POST but will immediately lock up at 133FSB but with most of the Tualatin-BIOS it won't even POST. 100FSB is no problem... and the board does 133Mhz FSB just fine with VIA C3 CPUs.

I contacted the seller of the modified CPUs and he offered to modify my board for free but I'll have still have to pay postage to South Korea and back. There is some language barrier but here is what he said of it:

And an overclocked BX M/B can not be guaranteed a working of P-IIIs 1.4G. Major reason is signal quality do not meet timing […]
Show full quote

And an overclocked BX M/B can not be guaranteed a working of P-IIIs 1.4G.
Major reason is signal quality do not meet timing specific.

GA6BXC uses a ICS9148-26 for Frequency Generator.
But, this IC is designed for 100MHz FSB.
=> https://www.idt.com/document/dst/9148-26-datasheet
( on page 3, => Note1. Performance not guaranteed )
This means actual FSB can be reached up to 131%(174MHz) for one clock timing level.
By this reason, CPU can be overclocked for short time.
If lucky, ICS9148-26 does not go to 174MHz or CPU works at 174MHz for short time.
But, any case it is out of specific.

Next can help you to understand what is need to work CPU.
=> http://download.intel.com/design/PentiumIII/d … ts/24526408.pdf
( page 22 to 55 )

Fixing will be simple and it is analog level works.
I do not have intent of changing any M/B function.
But, before measurement, I can not tell you which part or value will be changed.
And if big change is needed, I will ask you with details.

And M/B, MS6905 and CPU have signal quality control parts.
I will adjust only these parts.

All basic function will not be changed.
Modification key point is signal quality adjustment.
It is not adding or removing IC part.
After measurement of signal quality, adjusting value of resistor or capacitor.
Maybe, you will not know what is changed.

He also says he can find a way to get it running on my SE440BX-2 board if I wanted to use that."

infiniteclouds wrote on 2022-11-18, 04:05:

> This means actual FSB can be reached up to 131%(174MHz) for one clock timing level.

This part is nonsense or lost in translation. Generated clock has optional ±0.5% or ±1.5% constant modulation (Spread spectrum) so max is +2MHz, jitter is 250ps. Where did he come up with this 130% offset? As for "Note1. Performance not guaranteed" so is 112MHz. I dont think the mod has anything to do with clock generation chip.

rasz_pl wrote on 2022-11-19, 00:27:

infiniteclouds wrote on 2022-11-18, 04:05:

> This means actual FSB can be reached up to 131%(174MHz) for one clock timing level.

This part is nonsense or lost in translation. Generated clock has optional ±0.5% or ±1.5% constant modulation (Spread spectrum) so max is +2MHz, jitter is 250ps. Where did he come up with this 130% offset? As for "Note1. Performance not guaranteed" so is 112MHz. I dont think the mod has anything to do with clock generation chip.

Thank you for sharing your take. Frankly it's all beyond me but it sounds like I made the right decision not sending my board out for modification and settling for 100Mhz FSB when using my Tualatin-S in Slotket on this board. I didn't see these same issues at 133Mhz FSB on the C3 CPUs, though.

If its the guy manufacturing those Tulalatin flex interposers then Im sure he knows what he is doing and has some tricks up his sleeve, just that part I replied to was BS. Might be bad translation, might be wanting to keep secrets secret.