68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.
The "I couldn't let it go" Conquest
Posted by: snuci on 2015-03-07 08:17:34
In another thread, I made a comment about an eBay auction I couldn't let go.  Below is a picture of the memory that was part of the lot.  I don't know what they are as I only know the older stuff so any help from you guys (and girls) could provide as to what it is and what it fits in is greatly appreciated.

Picture 1

pic 1.jpg

Picture 2

pic 2.jpg

Picture 3

pic 3.jpg

Picture 4

pic 4.jpg

Picture 5

pic 5.jpg

Picture 6

pic 6.jpg

Picture 7

pic 7.jpg
Posted by: markyb86 on 2015-03-07 10:11:06
The ones with the 10 pins on the small segment of the connector are either PC66, PC100 or PC133 SDRAM, but the ones with 7 pins in that segment are something I can't identify either.
Posted by: TheWhiteFalcon on 2015-03-07 10:23:09
Picture 4 and 7 look like VRAM for the Quadras.
Posted by: CelGen on 2015-03-08 12:50:42
I spy 5v memory DIMMS and VRAM DIMMS for the power macintosh 8600 and similar machines. I'd be curious about the ones in picture 5 as they're a newer surface mount technology. They might possibly be 64 or 128mb DIMMs.
Posted by: trag on 2015-03-10 15:36:14
PIctures 1, 2, and 3 are 5V FPM DRAM DIMMs for the early PCI PowerMacintoshes.  Pictures 4 & 7 are VRAM DIMMs as TWF stated, although, perhaps 1 MB DIMMs for the 7500, 8500 and successors and clones.   I'm not certain without doing more work looking up the chips than I want to do.

5 and 6 also look like 5V FPM (or EDO) DRAM.    No idea what capacity.  Picture 2 are 16MB DIMMs (2M X 64 bits).   There was a searchable part number on those.   Plus I was interested because I'm looking for a 32MB version that used those long SOJ chips.  I'm pretty sure those can be soldered onto the empty pads on the PM6500 logic board to provide additional memory.

I do not think any of these are PC66 or later RAM.   While the arrangement of pins is the same, the notch placement is slightly different and all of the non-VRAM appears to have the same notch placement (left, middle, right in the space between the pins).   Notice that the center notch is left justified in all cases.
1