You have what is sometimes referred to as standard PC-66 RAM. Unfortunately, it wont quite work right in the SM computers. The important limitation is that "64MB DIMMs must use 11-bit row address (2KB refresh)". This limits the 2 banks of each DIMM to 32MB. You have DIMMs that are organized as 1 64MB bank, and only 32MB of memory can be read in each DIMM.
>Well... I got my RAM and it sorta worked, but not completely. I took the >16mb module out (I know I got that right as you'll see), and put in the two >64s. I started up my Mac and found that it thought I had 96mb instead of >the desired 160mb. So I figured one of my new modules was dead and I was >sad. But I didn't just leave it at that. I took one of the 64s out (of the >second slot, the one the 16 was in before) and rebooted, thinking I might >find the third slot or third module dead. This dropped my memory to 64mb. >This seemed really weird to me, because that'd mean the second module had >only been contributing 32mb. Then I took the 32mb module out of the single >bank slot, leaving only the 64 in the third slot, and rebooted. This left >me with 32mb of memory. Now I'm convinced that my supposed 64mb modules are >only giving me 32mb of memory. This isn't the kind of thing I thought was >possible: memory not working completely, except if I put it in the wrong >slot. And I'm confident that I didn't, especially since I got 32mb from >each dual-bank slot with a 64mb module. It'd be a really big coincidence, >to have exactly half of the chips damaged on each one, so I'm not assuming >that so far. > >Any ideas on what could possibly be happening? How to fix it? Note that >this RAM is made by IBM and wasn't sold with any claims of being made for a >Mac. However, I made sure it was 3.3v unbuffered non-parity 60ns EDO DIMM, >which were all the requirements I could find. It's single-sided, with chips >that are larger on the face, but stick out much less than the older chips. >The module stands a little taller in the slot too (yes it's actually taller, >I did push it in far enough). Hopefully the guy didn't send me 32mb >modules, but they have 64mb IBM stickers on them, with the right part >number, so I doubt it. I don't want to buy new RAM at the higher prices of >the stuff that claims to work in Macs, but I might have to. I'd probably >try to sell this RAM then. Should give 32mb (64 if you're lucky maybe) to a >Starmax owner. ;) -- -- Mr. PopMan - [EMAIL PROTECTED] - "Does anybody want to play a game of pinball?" There are no honorable bargains involving the exchange of qualitative merchandise like souls, for quantitative merchandise like time or money.--William S. Burroughs -- StarMax is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> StarMax list info: <http://lowendmac.com/lists/starmax.html> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/starmax%40mail.maclaunch.com/> Using a Macintosh? Get free email and more at Applelinks! <http://www.applelinks.com>
