Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!newstop!texsun!convex!woods From: woods@convex.com (Darrin Woods) Newsgroups: comp.sys.mac.hardware Subject: Re: SIMMs for IIsi - what do I need? Message-ID: <111547@convex.convex.com> Date: 17 Dec 90 01:31:05 GMT References: <110992@convex.convex.com> <1990Dec15.035554.15172@eng.umd.edu> Sender: news@convex.com Organization: Convex Computer Corporation; Richardson, TX Lines: 42 In article <1990Dec15.035554.15172@eng.umd.edu> russotto@eng.umd.edu (Matthew T. Russotto) writes: >In article amanda@visix.com (Amanda Walker) writes: >> >>This myth seems amazingly persistent in the Mac community. It makes no >>difference to anything except your pocketbook if a SIMM is faster than >>it needs to be. You can mix and match to your heart's content as long as >>each SIMM meets the *minimum* speed requirements. They just all have to >>be the same *size*. > >Talk to the Apple.people who wrote Tech Note 176... They are the promulgators >of the myth, and the people I always cite (as flame retardant) when I >mention it. > >Does anyone know WHY Apple says this? >-- >Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu Thank you. I have nothing against putting faster chips in a machine when there are chips already in the machine that are slower. As long as they all meet the required speed or faster this is acceptable. What I said didn't work was mixing speeds within a Bank. The mac requires that all chips within a given bank be the same speed. As to the earlier rebutal to my posting - you can sit in a lab all you want and test the SIMMS to your hearts desire, and you will probably acheive the same answers as stated earlier - it doesn't matter. Now sit in your lab with a Mac, and put different speed SIMMS within a bank and test out the circuits, that Mac cannot handle it. As to WHY Apple says this.. In this case it is because it is true. And I can testify that I have had the same results as Apple listed, as I have tried it. You get ID 01's and 03's. Blacksheep Senior Systems Engineer -- Darrin R. Woods woods@convex.com This is a guest account. Convex knows nothing about what I'm saying, or even that I'm saying it.