Path: utzoo!mnetor!tmsoft!dptcdc!berner!lethe!geac!jtsv16!uunet!lll-winken!ames!sgi!dunlap@bigboote.SGI.COM
From: dunlap@bigboote.SGI.COM (D. Christopher Dunlap)
Newsgroups: comp.sys.sgi
Subject: Re: Memory upgrades for 4D's
Summary: Be Careful
Keywords: memory,simms,eclipse
Message-ID: <31676@sgi.SGI.COM>
Date: 1 May 89 14:31:18 GMT
References: <8003@phoenix.Princeton.EDU> <1793@blake.acs.washington.edu>
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 47

In article <1793@blake.acs.washington.edu>, davis@blake.acs.washington.edu (Darrell Davis) writes:
> In article <8003@phoenix.Princeton.EDU> zanetti@phoenix.Princeton.EDU (Gianluigi Zanetti) writes:
> >
> >The memory seems to be in the form of 1Meg simms.  What is the preferred
> >style?  How fast do they have to be?  The reason I ask is that if we could
> >use mass market simms they would be at least half the price.
> >
> 
> We just specified 1 meg SIMMS, 100 nsec, 
> and didn't have any trouble, they are quite easy to install


Be VERY careful about this. 

The boards are EXTREMELY static sensitive. Static damage can be very 
insidious in that it may not effect the performance of the system
for as much as several months, and then start failing intermittently.

Be sure to use an anti-static surface and ground yourself and the
anti-static surface to the chassis of the system with anti-static 
straps. These can be had at any electronics supply place.

The sockets that the SIMMS go in can be broken easily. They are, as
Mr. Davis says, quite easy to install - but be careful.

The speed and size of the SIMMS isn't the only criteria for ensuring
that the SIMMS will work properly in any particular system. Computer
companies regularly qualify or disqualify manufacturers of various
components, and memory is no exception. Memory you get from Silicon
Graphics is warranted to work correctly in your system. Go to another
vendor and "you takes your chances".

So long....



chris



--

D. Christopher Dunlap		email: dunlap@sgi.sgi.com

Hardware Product Support 
Customer Support Division
Silicon Graphics Computer Systems