printer memory according to this:
https://www.itechtics.com/dimm-sodimm-microdimm/

Sony notebook used these as well. I know as I had one. Was for one of early Pentium M type.

Cheers,

Those are a less popular option from the end of the extremely unreliable generic laptop era (caps, cold solder and more)

When that module was contemporary most people already had more than 64mb

Anything that used that is probably ewaste.

Now embedded maybe still useable

http://ebook.pldworld.com/_eBook/www.eproduct … mmer%202012.pdf

Some Toshiba Portegre models like the 3110CT also had those

konc wrote on 2025-02-04, 09:20:

Some Toshiba Portegre models like the 3110CT also had those

Conicidenatlly I saw this yesterday in a video by Action Retro...

rmay635703 wrote on 2025-02-04, 03:11:

Now embedded maybe still useable

http://ebook.pldworld.com/_eBook/www.eproduct … mmer%202012.pdf

Interesting read!

pentiumspeed wrote on 2025-02-03, 23:46:

Sony notebook used these as well. I know as I had one. Was for one of early Pentium M type.

Cheers,

Pretty sure you're remembering sodimms.

Why?
P2/3 chips had 64 bit memory buses.
I'm not aware of any chipsets that could run 32bit.
Which means a minimum of 8x8bit chips for one bank.
Sodimms had 4 per side.

Printers on the other hand were probably still running 32bit, so 4x8bit like shown would be ok.

nfraser01 wrote on 2025-02-03, 21:15:

As the subject really...

I have the attached MicroDIMM but not anything I can use it in. In fact can't find a specific refernce to any laptops that use them...

Thoughts?

They're used by ultraportables from 1999 to 2001-ish. You can find PC100 / PC133 SD-RAM Microdimms in:

• Toshiba Portege 3110CT & 3400 series
• Panasonic 'Toughbook Light' CF-R1 (otherwise known as the lets-note CF-R1 since it's far more common in Japan)
• Fujitsu Lifebook P-2000 series
• Sony Vaio PCG-SR (bx chipset) series
• Sony Vaio PCG-SRX (815/830 chipset) series
• Sony Vaio PCG-VX series (apparently, can't confirm myself)

Sony were big fans of MicroDIMMs, the DDR Pentium M laptops like most of the VGN-S series and PCG-TR series all used them too, but those are DDR not SDRAM

Hmm
How the hell did they make 4 chips work on the bx?

Thermalwrong wrote on 2025-02-05, 04:05:

They're used by ultraportables from 1999 to 2001-ish. You can find PC100 / PC133 SD-RAM Microdimms in: […]
Show full quote

They're used by ultraportables from 1999 to 2001-ish. You can find PC100 / PC133 SD-RAM Microdimms in:

• Toshiba Portege 3110CT & 3400 series
• Panasonic 'Toughbook Light' CF-R1 (otherwise known as the lets-note CF-R1 since it's far more common in Japan)
• Fujitsu Lifebook P-2000 series
• Sony Vaio PCG-SR (bx chipset) series
• Sony Vaio PCG-SRX (815/830 chipset) series
• Sony Vaio PCG-VX series (apparently, can't confirm myself)

Sony were big fans of MicroDIMMs, the DDR Pentium M laptops like most of the VGN-S series and PCG-TR series all used them too, but those are DDR not SDRAM

That's a decent list - thank you!
Now the dilema - do I buy a laptop to fit my card or sell the card!

myne wrote on 2025-02-05, 04:43:

Hmm
How the hell did they make 4 chips work on the bx?

I think for 64MB it doesn't matter and 4 chips is okay. Checking my PCG-SR33K laptop it's got a pair of 4-chip 64MB MicroDIMMs for a total of 128MB memory and it's got a BX chipset.

The highest size MicroDIMMs go up to is 128MB per DIMM, those have 8 chips. Usually those PC100 specifically.

There are 4-chip 128MB PC133 MicroDIMMs and I guess there are probably 256MB 8-chip PC133 MicroDIMMs, but those will only work with the later Intel 815 / 830 chipset.

nfraser01 wrote on 2025-02-05, 12:42:

Thermalwrong wrote on 2025-02-05, 04:05:

They're used by ultraportables from 1999 to 2001-ish. You can find PC100 / PC133 SD-RAM Microdimms in: […]
Show full quote

They're used by ultraportables from 1999 to 2001-ish. You can find PC100 / PC133 SD-RAM Microdimms in:

• Toshiba Portege 3110CT & 3400 series
• Panasonic 'Toughbook Light' CF-R1 (otherwise known as the lets-note CF-R1 since it's far more common in Japan)
• Fujitsu Lifebook P-2000 series
• Sony Vaio PCG-SR (bx chipset) series
• Sony Vaio PCG-SRX (815/830 chipset) series
• Sony Vaio PCG-VX series (apparently, can't confirm myself)

Sony were big fans of MicroDIMMs, the DDR Pentium M laptops like most of the VGN-S series and PCG-TR series all used them too, but those are DDR not SDRAM

That's a decent list - thank you!
Now the dilema - do I buy a laptop to fit my card or sell the card!

Well, the Toshiba Portege 3110CT & 3440 / 3480 / 3490 are all relatively common and can be had cheaply sometimes.
The Panasonic CF-R1 seems to be really rare outside of Japan, nothing too special about it performance / functionality wise though I really like the form factor & design.

The PCG-SRX is pretty rare and it takes PC133 microdimms so your one likely wouldn't work with it? The PCG-VX is even rarer and imo quite a pointless computer because it's not that light at 2kg for a 14" screen, but it uses microdimms and has no optical drive.

The Vaio PCG-SR is the best of them since it's got Yamaha YMF744 audio and either Neomagic (PCG-SR1K) or S3 Savage/IX video on the later models. They're not too common but people often list them with just the part code on the bottom of the laptop which is like PCG-432L or other less meaningful numbers, correlating the two is a pain. It has 2x MicroDIMM slots so these MicroDIMMs can be useful upgrades.
Something to watch for on the PCG-SR laptops especially the later ones is the ADP3421 speedstep voltage controller going bad which makes the laptop not power up at all, so if you're not experienced with SMD soldering then make sure you look for one that turns on okay.

Thermalwrong wrote on 2025-02-05, 15:37:

Well, the Toshiba Portege 3110CT & 3440 / 3480 / 3490 are all relatively common and can be had cheaply sometimes.

The 3100CT was on my shortlist previously anyway...

Thermalwrong wrote on 2025-02-05, 15:37:

The PCG-SRX is pretty rare and it takes PC133 microdimms so your one likely wouldn't work with it? The PCG-VX is even rarer and imo quite a pointless computer because it's not that light at 2kg for a 14" screen, but it uses microdimms and has no optical drive.
The Vaio PCG-SR is the best of them since it's got Yamaha YMF744 audio and either Neomagic (PCG-SR1K) or ATI video on the later models.

I have various early VAIO's, but none of these unfortunately.

Thermalwrong wrote on 2025-02-05, 15:37:

They're not too common but people often list them with just the part code on the bottom of the laptop which is like PCG-432L or other less meaningful numbers, correlating the two is a pain.

Yeah, never really understood that . There must be a marketing reason for it...

Thanks for the info.