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From: cjeff@ghoti.lcs.mit.edu (Carl J.M. Alexander)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Can you mix SIMM speeds in one CPU?
Message-ID: <1991May17.083051.13427@mintaka.lcs.mit.edu>
Date: 17 May 91 08:30:51 GMT
References: <1991May16.133437.1@gsbacd.uchicago.edu>
Sender: news@mintaka.lcs.mit.edu
Organization: BCS*Mac
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gft_robert@gsbacd.uchicago.edu (opcode ranger) writes:
>I have a Mac II w/ 5 megs RAM: 4 1 MB SIMM's....The 1 MB SIMM's
>are 80 ns, I believe.  Can I go to 8 meg using slower SIMM's in the other 4
>sockets....

You're on target.  As long as you don't mix speeds within the same *bank*
of SIMMs, and they all meet the machine's requirements, you're fine.  One
question, though:  where do you expect to get SIMMs slower than 80ns?
Last time I went SIMM shopping, all the vendors were selling only 80s
(except of course to fx owners); one told me that it had reached the 
point where, if they carried 110s, they'd have to sell them for maybe 
a buck or two less than 80s, so they just rationalized on one product. 
 
--Carl Alexander 
News Editor, The Active Window 
cjeff@ghoti.lcs.mit.edu