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Date:      Sat, 22 Jun 1996 17:54:15 -0400 (EDT)
From:      "Ron G. Minnich" <rminnich@Sarnoff.COM>
To:        Bradley Dunn <dunn@harborcom.net>
Cc:        nash@mcs.com, freebsd-hardware@freebsd.org
Subject:   Re: Mixing SIMMs of different speeds
Message-ID:  <Pine.SUN.3.91.960622175232.8451B-100000@terra>
In-Reply-To: <199606222118.RAA17013@ns2.harborcom.net>

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simm speeds are determined by the speed grade jumpers soldered onto the
simm module. RAM controllers use these jumpers to drive timing. If the
hardware only uses one simm slot to determine timing for the system, AND you 
mix simm speeds, then obviously strange things are going to happen if the 
system drives 70 ns simms with 60 ns timing. 

ron 

Ron Minnich                |"Inferno runs on MIPS ..., Intel ..., and AMD's
rminnich@sarnoff.com       |29-kilobit-per-second chip-based architectures ..."
(609)-734-3120             |  Comm. week, may 13, pg. 4. 
ftp://ftp.sarnoff.com/pub/mnfs/www/docs/cluster.html 





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