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Article #18974

Re: What good are Bios RAM tests ?

#18974
From: Charles Elliott
Date: Thu, 21 Jan 1993 12:26
29 lines
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In article <1993Jan21.112136.2125@dmu.ac.uk> cph@dmu.ac.uk (Chris Hand) writes:
>I took the top 4 Megs of (3-chip) SIMMs out of my machine leaving only
>9-chip ones in there and the crashes have stopped, from which I conclude
>that either (a) My chipset doesn't like 3-chip SIMMs, or (b) there is
>a fault in the m/board which shows up when both banks are populated.

As far as I know, it is *not* correct to say that a MB that can take
four Meg SIMMs can use 3-chip 1Meg SIMMs. Originally, I thought that this
was true, but after working for a PC manufacturer that has encountered these
problems, I have been assured that this is not the case. 

The symptoms you are describing when using 3-chip SIMMs are exactly the
same as problems that I have experienced, e.g. random lock-ups and crashes.
Unfortunately, even using programs such as CheckIt (which we use extensively
for system testing) will not necessarily show up these problems. All that I
know, is that the chipset has to be capable of supporting a certain refresh
cycle to use the 3-chip SIMMs

---
 Charles Elliott			     E-Mail:cae@dcs.warwick.ac.uk
 Department of Computer Science              
 University Of Warwick 			    
 Coventry CV4 7AL			    
 England

>Chris Hand, Lecturer                Internet mail: cph@dmu.ac.uk
>Dept of Computing Science,          Voice: +44 533 551551 x8476
>De Montfort University, The Gateway,  Fax: +44 533 541891  FIDOnet: 2:440/32.50
>LEICESTER, UK   LE1 9BH             >> Linux: *free* unix for IBM PCs! <<
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From: cae@dcs.warwick.ac.uk (Charles Elliott)
Subject: Re: What good are Bios RAM tests ?
Message-ID: <1993Jan21.122611.6550@dcs.warwick.ac.uk>
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References: <1993Jan15.111338.11134@dmu.ac.uk> <1jagkpINNarn@mudos.ann-arbor.mi.us> <1993Jan21.112136.2125@dmu.ac.uk>
Date: Thu, 21 Jan 1993 12:26:11 GMT
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