Those are pretty ridiculous coolers for any Pentium MMX. Were they trying to air-condition the server room at the same time?

The sticker on the southbridge is typically Soyo, if dual MMX, this has to be i430HX chipset, so this is almost certainly a Soyo 5TH0/H2/H5:
http://www.uncreativelabs.de/th99/m/S-T/34070.htm

Agreed that those Gorbs deserve a P3 that actually needs cooling. For P55C, they would work fine as passive heatsinks, just disconnect the fan.

Edit:
As for other stuff - it's an HX chipset. so max RAM 512MB. How much is cacheable depends on the tag RAMs, with one it can only cache 64MB, with two it can cache all 512MB. That pic shows two tags, so 512MB is cacheable.

Apart from that, max official CPU is P233MMX, but the chipset can easily handle 75MHz FSB and frequently also manages 83MHz. You can't do dual CPU on K6 or MII CPUs, but you can overclock those P200MMX beauties if you can figure out how to... it might be interesting to see what setting JP10 and JP11 both to open does. Depending on the PLL, it might do 55MHz (crap), 68MHz (not really interesting) or 75MHz (now we're talking).

yes, this is SMP Soyo 5TH10 (intel 430HX)

Wow, cool. I have seen a bunch of dual slot 1 boards, but dual socket 7 is a lot more rare.

I am like 99.999% sure there were no MMX dual cpu boards. The best chips those could be are the non-mmx 200.

luckybob wrote:

I am like 99.999% sure there were no MMX dual cpu boards. The best chips those could be are the non-mmx 200.

Afraid it's that 0.001%

P55C was SMP-capable, and any i430HX chipset will (with suitable VRM and BIOS support) do SMP with them. Years back I ran two myself on a P65UP5/C-P55T2D (weird backplane motherboard with two different CPU boards, either 2x So7 with i430HX chipset or 2x So8 with i440FX chipset). Apart from this Soyo board Asus also had a more 'normal' dual P55C-board, the P55T2P4D. They even still have it on their support site, with official support for P200MMX and P233MMX: https://www.asus.com/supportonly/PE-P55T2P4D/HelpDesk_CPU/

I own the p65up5, and its big brother p65up8. ^.^ Although I do need to get the p55t2d card.

I'm kinda still in the camp of MMX not being SMP.

I'm willing to bet the farm, the board might accept a single MMX chip and run fine, but its burned into my brain, SMP wont work with MMX. I'd LOVE to be proven incorrect though! The only dual socket 7 board I own (TYAN S1562D) specifically states, no smp with mmx. Doens't even allow jumper settings for 233mhz either. (A tyan board)

luckybob wrote:

I own the p65up5, and its big brother p65up8. ^.^ Although I do need to get the p55t2d card.

I'm kinda still in the camp of MMX not being SMP.

I'm willing to bet the farm, the board might accept a single MMX chip and run fine, but its burned into my brain, SMP wont work with MMX. I'd LOVE to be proven incorrect though! The only dual socket 7 board I own (TYAN S1562D) specifically states, no smp with mmx. Doens't even allow jumper settings for 233mhz either. (A tyan board)

Not sure about the Tyan S1562D, but the S1563D certainly seems to be able to do it: https://youtu.be/Ruwltdtff-g

Edit:
Another Vogon did it on the S1562D too - Tyan S1562 Dual Pentium MMX succes

luckybob wrote:

I'm kinda still in the camp of MMX not being SMP.

I was pretty sure about that too, until reading this thread - and the links in this thread .. I'd like to own a P55 SMP system 😎

n0m4d wrote:

Hi. Can somebody tell me something about this MB?

I can tell you that it looks AMAZING and that I WANT IT.

luckybob wrote:

I own the p65up5, and its big brother p65up8. ^.^ Although I do need to get the p55t2d card.

I'm kinda still in the camp of MMX not being SMP.

I'm willing to bet the farm, the board might accept a single MMX chip and run fine, but its burned into my brain, SMP wont work with MMX. I'd LOVE to be proven incorrect though! The only dual socket 7 board I own (TYAN S1562D) specifically states, no smp with mmx. Doens't even allow jumper settings for 233mhz either. (A tyan board)

Overdrive MMX processors are definitely not SMP capable, but it seems regular MMX processors are - eg https://datasheet.octopart.com/PENTIUM-MMX-23 … eet-7279168.pdf

Have also a dual MMX with smp
Re: Dual Socket 5/7 Boards