EnigmA Amiga Run 1997 July/EnigmA AMIGA RUN 20 (1997)(G.R. Edizioni)(IT)[!][issue 1997-07 & 08][EAR-CD IV].iso/lightwave/lwmlist/95.lightwave-05/[e-mail]_Sun May 14 15:26:20 1995.msg

Internet Message Format | 1995-06-03 | 3KB

Received: by webcom.com
    (1.37.109.15/16.2) id AA175310380; Sun, 14 May 1995 15:26:20 -0700
Return-Path: <[e-mail]>
Received: from relay1.geis.com by webcom.com with ESMTP
    (1.37.109.15/16.2) id AA175240366; Sun, 14 May 1995 15:26:11 -0700
Received: by relay1.geis.com
    (1.37.109.11/15.6) id AA024280529; Sun, 14 May 1995 22:28:49 GMT
From: [e-mail]
Message-Id: <[e-mail]>
Date: Sun, 14 May 95 21:51:00 UTC
To: [e-mail]
Subject: PC: Dual P5/100 info
X-Genie-Id: 8300123
X-Genie-From: T.TAYLOR4
Sender: [e-mail]
Precedence: bulk

Someone recently asked me how I had two pentiums on my motherboard as
the "second chip" wasn't in production yet.  Well, I did some asking
around and got the following information.  I was asked not to provide
source information for job security reasons, so don't ask.


Intel different revision of their chip into stepping.  For Pentium
75/90/100 MHz, there have been stepping B1, B3 and B5 so far.  B1 is the
stepping with the now famous floating point error.  B1 and B3 require a
specific CPU in the second CPU slot, i.e. to make a DP motherboard to work
you need a P54C in the primary socket and a P54CM in the secondary socket.
Stepping B5 and subsequent stepping (C1 and C2) have solve this problem,
i.e. you can plug any two B5, C1 or C2 P54C into the MB and it will work.
Since B5 was introduce at beginning of 1Q of this year, you can expect
most of the CPU out there works with DP motherboard.
   There is one exception to this rule, and it is the 120MHz Pentium.  As
I have posted in the BBS, making 90/100 MHz motherboard to work at 120 MHz
is a very minor modification, since it 120 MHz is the next multiple from
90 MHz.  Unfortunately, Intel...uh...."screw up" on the 120MHz's
multiprocessor support.  If you plugg two 120 MHz onto Dual MB, it will
probably work, but it definitely not guarantee by Intel.   You might be
seeing advertisement selling 120 MHz Dual MB....they're taking a gamble with
your system.  The correction chip will not be available until end of June;
therefore, you will not see them on the market until mid or late 3Q 95.


And there you go... that's the scoop.

Tank Taylor


--
[e-mail] sent this message.
To Post a Message           : [e-mail]
Un/Subscription Requests To : [e-mail]
(DIGEST)                 or : [e-mail]
Administrative Items To     : [e-mail]