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30-pin SIMM RAM identification and testing help

jessenator

Well-known member
Greetings. 

I came into possession of a lot of 30-pin SIMMs, most of which are from PCs of the era. There are a handful whose stamped part numbers I was unable to ID via the google, and wondered if anyone could help decipher them.





Incidentally, is there a market for 256 KB and 512 KB modules anymore? The vast majority of my haul consists of 256 KB modules.

Since I've only got an SE/30, I'll really only be able to test the quads I have, but at least I could swap them in if I know what size they are. But now that I think on it, with the plastic clips, that might not be a good idea...Do I need to risk damaging the ram holders on my SE/30 or is there another way short of purchasing a SIMM tester?

 

Byrd

Well-known member
Yeah those plastic clips on SE/30 are horrible, don't test RAM on using such a design for fear of snapping them.

There is no market in low density, stock config RAM modules apart from keyrings :)

 

jessenator

Well-known member
There is no market in low density, stock config RAM modules apart from keyrings :)
:lol: yeah I figured as much. That's not a bad idea, actually!

Maybe I could get my buddy with his 486 rig to test them for me... I think his board has metal clips.

 

bibilit

Well-known member
The top ones are 1 Mb units. 

(Either identified as 1M / or a variant of 1000)

the bottom ones don’t know. 

256 will go on a Plus for instance, even a Se/30 (second bank )

512 don’t remember, never seen. 

 

jessenator

Well-known member
256 will go on a Plus for instance, even a Se/30 (second bank )
Sure. Maybe someone wants to restore a 4 MB model Plus back to factory. I guess it comes down to whether or not people would even want to buy them. I once wanted to do the oddball 17 MB config in my SE/30, where the an unreliable source mentions putting 256 K SIMMs in bank A (versus B ) results in faster performace?

I want to say that my IIsi had some 512 K sticks in them when I got it from the original owner. Was that the "2 MB Upgrade Kit" from Apple?

 

trag

Well-known member
Sure. Maybe someone wants to restore a 4 MB model Plus back to factory. I guess it comes down to whether or not people would even want to buy them.
One of the Newlife upgrades for the 512K/128K had eight SIMM sockets on board.  Installed in a 512KE, the  upgrade would use the 512KB on the logic board, then install a pair of 1MB SIMMs, which makes 2.5, then populate the other six slots with 256KB SIMMs, and you get 4MB.

Unfortunately, the supply of Newlife upgrades is extremely limited.

 
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