Vogons member Wolfus found one last month:

Re: Bought these (retro) hardware today

Original adapter is most likely compatible only with PGA Celerons.

http://www.computer-specifications.com/specif … card-Specs.html

[[The specs for TwinMagic (BrillianX 2 + TM CPU card) comes in these configurations with a retail price tag. The configuration LegendQDI provides comes with a 450~850MHz Intel Pentium III, 233~450MHz Intel Pentium II or 233~533MHz Intel Celeron Supports Dual Intel Socket 370 processors by using Twin Magic Card. Ultra ATA/33 PCI/ISA/AGP n/a.]]

I hope this one has a sort of custom retention mechanism. It looks like, with the CPUs and Fans installed, would be enough heavy to f*ck the slot and the board, specially with beefy later coppermine Celerons/P3.

PARKE wrote:

or 233~533MHz Intel Celeron Supports Dual Intel Socket 370 processors by using Twin Magic Card.

So that's exactly what I've expected. Only PPGA Celerons are supported with that adapter. It would be interesting to recreate such adapter, but with Coppermine/Tualatin support.

A real challenge would to to install two of these in a Dual Socket motherboard and end up with a Quad CPU system !

That would require specific chipsets, which were designed for servers. Your standard 440BX can't work with more than two physical CPUs.

The Serpent Rider wrote on 2020-12-02, 15:58:

That would require specific chipsets, which were designed for servers. Your standard 440BX can't work with more than two physical CPUs.

I never specified it would be easy and given the 450GX is limited to 4 CPUs, but the ALR 6x6 supports 6 CPUs I can't see why a similar solution could not be used.

red-ray wrote on 2020-12-02, 16:30:

I never specified it would be easy and given the 450GX is limited to 4 CPUs, but the ALR 6x6 supports 6 CPUs I can't see why a similar solution could not be used.

Man, the CPU board on that machine has 2 CPLDs in the CPU card... But what is more, It has 2 450GX Northbridges! (With each Northbridge is running 3CPUs and accessing half of the memory... Most probably this unusual configuration isn't even NUMA and would require a custom HAL in XP/2k3 Windowses). I've seen the photos on both the CPU and the Logic Board.

Is not the same thing as your of-the-shelf Slot1 board, even if it is double slot flavor.

hyoenmadan wrote on 2020-12-02, 18:10:

Most probably this unusual configuration isn't even NUMA and would require a custom HAL in XP/2k3 Windowses)..

Running XP is problematic as it only supports two sockets and 2003 won't run at all. Looking at http://www.cpushack.com/2019/01/14/part-2-min … rver-from-1997/ you should see that a custom HAL is not needed for the beta release of .NET/XP server though.

Another interesting aspect of the ALR 6x6 is that it works with 6 x P-II Overdrives which are only supported in Dual CPU systems. Given there are 3 CPUs on each card your guess about 3 on each 450GX seems unlikely and there must be some special hardware.

The reason I mentioned the ALR 6x6 in the first place is as an example of a system that overcomes the limitations of the MCH chipset by having special extra hardware. I suspect that in theory this is possible for any MCH chipset including the 440BX.

That's absolutely not the topic of this thread though.

The Serpent Rider wrote on 2020-12-01, 19:53:

It would be interesting to recreate such adapter, but with Coppermine/Tualatin support.

The Serpent Rider wrote on 2020-12-02, 20:48:

That's absolutely not the topic of this thread though.

I can't see why you feel this given your statement about one with Coppermine/Tualatin support. To me it seems reasonable to consider if a pair of such an adapters could allow four CPUs to be used in a dual Slot 1 board.

Gigabyte were also working on a similar dual sloket at the time, with wider board support, though I don't think it ever made it off the stocks

"A unique product was exhibited at GIGA-BYTE Technology's booth, attracting the attention of visitors. The name was also called "GA-6RD7", and it was explained as "Single card supports Dual CPU". The CPU supports the CPGA Celeron and fc-PGA's Pentium III, but it has two PGA370 sockets on a single CPU board. Moreover, according to the explainer, it is even more surprising that it can be used with ordinary SC242 (Slot1) motherboards.

In order for intel CPUs to work dual normally, a chip called ASIC must be installed on the motherboard side. However, it can be said that it is a surprising product because it can be used with a normal SC242 that does not have it with this product. Considering the history of dual Celeron so far, it is likely that this product will spark a new dual Celeron boom, and it is a product that I want to run for reservation even now. However, at present, the revision is still in the early development stage with a revision of 0.1, and the shipping time has not been decided."

Wasn't the ASIC functionality integrated in the BX chipset?

Edit: Or is it actually called APIC? (Advanced Progammable Interrupt Controller)

Most probably you would need an Slot1 board with IOAPIC... Or if the chip is built with the adapter, you would need a board which can enable such chip. Is probably these adapters were built with an specific range of boards in mind.

H3nrik V! wrote on 2020-12-03, 14:30:

Wasn't the ASIC functionality integrated in the BX chipset?

Nope... I guess they started to integrate it in the i820 chipset. It only became mainstream with the P4 chipsets.

hay guize! How's it going in this thread?

https://imgur.com/gallery/4B6GUsp