OK, so this has never happened to me before, but I genuinely don't know what kind of memory this slot is supposed to take. The manual and places selling compatible RAM state it should take a DDR SODIMM, which I have - the STICK I intended to fit is placed next to the slot in the second photo, for reference. The slot is far too big, and wrongly keyed, for SODIMM, and too small for a DIMM, whether DDR, DDR2 or DDR3. Any ideas?


Is this a printer, the slot looks very similar to the RAM slot in my old LaserJet.

It's my understanding that it's special RAM designed for use in printers.It is indeed a printer...confusingly it's listed as a standard SODIMM everywhere that sells memory for it, hence my confusion.
Plus, someone told me it would take a standard laptop module...guess they were wrong!

Thanks for clearing that up hah, even though it's a shame because I don't have any All SODIMM slots look like this.


From pic, I can't tell where locating tabs on slot are located.



What is make & model of printer?

Could it be a 72-pin SIMM? Bottom pic, top is 30-pin
Per this sourse, it is a standard SDRAM slot, NOT a DDR SDRAM slot as with most other boards.

"Note that the SDRAM module has two notches on the bottom edge, while the DDR1 SDRAM module has only ONE."

Source: http://en.wikipedia.org/wiki/DIMMI found the same thing. http://en.wikipedia.org/wiki/DIMM
Two types of DIMMs: a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). Note that the SDRAM module has two notches on the bottom edge, while the DDR1 SDRAM module has only one. Also note that both modules have 8 RAM chips, but the lower one has an unoccupied space for a 9th.



Therefore, DIMM, not SODIMM.This is what led to my confusion over it, as the only places I could find selling supposedly compatible memory stated it was a DDR SODIMM, but it looks nothing like it. I'd never seen an upright SODIMM slot, either, so I figured they had to be wrong.
If you click the images, you'll be able to view them full size, and see the locating tabs.
Looks like old-school SDRAM, then, as it does have the two locating tabs. Been a long while since I've used any of that, they're between a DDR DIMM and a SODIMM in size right? If so then that matches up perfectly.

I'll go kick the guy who told me it would take a DDR SODIMM, no idea what he was thinking of and his certainty just threw me right off the TRACK here. I'll have a dig through my "ancient parts" bits box and see if I have anything suitable.
Thanks for the help.My policy has always been that if the device in question is not a PC, don't take any of the markings on it's logic board or what it says on the manual directly. DDR/DDR2/DDR3 memory refers to the chip design, so even if the manual says it took, say, DDR2, if it's a manual for a Printer I would never believe until I was actually able to insert one that it actually took a standard PC DDR2 DIMM. Usually they use some funky proprietary connection.That's probably about right BC, never done much work on printers before apart from the usual maintenance and fixes so this would've been my first time upgrading memory. TURNS out it takes 100 pin DDR, according to a bit more research today, so that's one upgrade I won't be doing as the printer was free and 256MB of memory for it is nearly £60 - despite a review claiming "Dell charges a modest £18 for 256MB" I can't find a mention of it on their site at all. Ah well.They probably used to offer the upgrade for that price. But the last few times I've had to buy old RAM I was shocked that it cost much more than modern RAM per MB. Anyway, good to know what it is. It's definitely more difficult to figure those things out with anything other than a PC cause they always do something ODD. Even with a lot of Dell boxes, they use tons of custom design stuff so that you have to buy Dell parts.That slot looks just like the old PC133 ram. I've got boxes full of it.
But if I remember correctly, there were about four different types of it and they did not cross.

Look around any local PC shops. You will probably find some there. Finding the exact right ram would be hit or miss.

Good Luck,
My HP LaserJet 2100 came with 4MB RAM, upgraded it with a single 16MB DIMM. There are 3 slots, max memory is 52MB. RAM was expensive back then (1999), so only bought 1 module.
The HP LaserJet 2100 products support the following DIMM types:

EDO: (Extended Data Output) technology that retains data in memory while the processor continues with other operations. This memory is single-tasking.
Specifications: EDO: 100 pin, 32 bit, 60ns, 3.3 volts, 1K refresh rate

EDO was always more expensive, but this one's not too bad at $20.

A lot of memory suppliers call them SODIMMS, when they are not. They call this a SODIMM?
16MB HP LaserJet 1100/2100 Printer EDO SODIMM (p/n C4137A)


[recovering disk space, attachment deleted by admin]Turns out the problem I was having with it printing slowly wasn't caused by the low RAM, anyway, it was a driver issue. At first, the first page would print really quickly, then there was a long delay between subsequent pages, talking 2-3 minutes to start printing the next page. This was just text, no images. Later prints would also be slow unless I rebooted the printer. Installed it on my gf's laptop to test it, and that worked fine, so I grabbed the driver from Windows Update instead of the latest driver from the manufacturer and it now prints nice and quickly over the network. I might upgrade it anyway as I found some that should be suitable for £12, but it doesn't seem like it's necessary now.