Rockin' Kat Posted March 12, 2011 Share Posted March 12, 2011 Hey, so I'm going through a box and I found this buried at the bottom. on front: ME72830F SIMM EXPANDER ASSY NO:925-0003 REV B on back: WINDEN ENTERPRISES FAB NO:900-0003 REV B ©1995 611D657H I do not know anything about this thing... Sorry for the crummy web cam shot. Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 12, 2011 Share Posted March 12, 2011 (edited) Probably from an earlier era PC to allow the old 30 pin SIMMs to occupy a 72 pin SIMM slot. The 72 pin SIMMs came in around the '486 era, so probably early 1990s. Fairly sure only that would only work on a system that takes the earliest Fast-Page mode 72 pin SIMMs. They were fairly quickly superseded by EDO. They were also typically installed in pairs, so you'd probably need 2 of those adaptors to be of any use. ed - probably not much use for it today, but nice collector's piece. People still practically thrown out both types of RAM, so it can be picked up real cheap. Also pretty certain the 30-pin ones only went to 4 Meg max size, where the 72 pin ones went to at least 16, possibly even 32 or 64 Meg. Edited March 12, 2011 by Rybags Quote Link to comment Share on other sites More sharing options...
Seob Posted March 16, 2011 Share Posted March 16, 2011 (edited) Correct. This is a adapter where one can plug in 30 pin memory modules, to be used in 72 pin memory slot. Used on 486 class pc's. Some mobo could have both 30 and 72 pin memory slots installed on board. You need at least 4 identical 30 pin simm modules to get it working on a 486, due to the fact that a 30 pin simm has a bandwidth of 8 bits and the 72 pin simm has a 32 bit bandwidth. so 4x 30 pin simm equals 1 72 pin simm. Edited March 16, 2011 by Seob Quote Link to comment Share on other sites More sharing options...
unhuman Posted March 17, 2011 Share Posted March 17, 2011 The most famous brand was called SimmVerter.... I had one plugged into another - it was quite an unreliable mess. Quote Link to comment Share on other sites More sharing options...
BillC Posted April 22, 2011 Share Posted April 22, 2011 Probably from an earlier era PC to allow the old 30 pin SIMMs to occupy a 72 pin SIMM slot. The 72 pin SIMMs came in around the '486 era, so probably early 1990s. Fairly sure only that would only work on a system that takes the earliest Fast-Page mode 72 pin SIMMs. They were fairly quickly superseded by EDO. They were also typically installed in pairs, so you'd probably need 2 of those adaptors to be of any use. ed - probably not much use for it today, but nice collector's piece. People still practically thrown out both types of RAM, so it can be picked up real cheap. Also pretty certain the 30-pin ones only went to 4 Meg max size, where the 72 pin ones went to at least 16, possibly even 32 or 64 Meg. The 30-pin SIMM was available in 16MB, used in Macs. The 72-pin FPM SIMM was available to at least 128MB, these are tall and were probably used mainly in servers. Quote Link to comment Share on other sites More sharing options...
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