Hi all, I have a couple of 7220s I've been working on for a while,
finally found some memory for them but had an interesting experience I
thought I'd share with you - as far as I know the 7220 was the only Mac
to use 3.3v 168-pin unbuffered memory, and I found some Apple branded
RAM that was badged as 64MB and worked in my 7220s, but only showed up
as 32MB!
The 7220 has 3 RAM slots, one is for single-banked RAM and the others
are for double-banked, I tried this stick in both slots on three
different machines but it only showed up as 32MB. Finally as a last
resort I tried the RAM in an old IBM 300PL I had picked up for parts (it
takes the same type of RAM) and behold! it worked as 64MB.
My question is: did I miss something here? I would have preferred to use
the 64MB stick in my 7220 (one of them has a G3 card so I wanted to use
it in that one.) I know the machines can use 64MB sticks, because I had
one other 64MB that does work in my G3 (also Apple branded but otherwise
quite different.) Similarly I found another non-Apple stick that only
works as 64 in the IBM (but I was less surprised about that.) I'm really
puzzled about the Apple branded one that didn't work properly. What
machine would it have been intended for if not the 7220?
Anyway it's no big deal, I'll just have to find a use for my IBM rather
than cannibalising it for parts as I had planned.
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