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- From: griest@ajpo.sei.cmu.edu (Tom Griest)
- Subject: Re: REQUIREMENTS TO RUN NT - HELP
- Message-ID: <1993Jan25.153720.18367@sei.cmu.edu>
- Keywords: Memory Problems
- Sender: netnews@sei.cmu.edu (Netnews)
- Organization: Software Engineering Institute
- References: <1993Jan21.005125.4596@nuscc.nus.sg> <1993Jan22.224431.25788@microsoft.com> <1993Jan25.023051.1@cc.curtin.edu.au>
- Date: Mon, 25 Jan 1993 15:37:20 EST
- Lines: 22
-
- In article <1993Jan25.023051.1@cc.curtin.edu.au> zrepachol@cc.curtin.edu.au writes:
- >Interesting you should say this. Let me make a few preliminary comments on
- >memory and some system boards. We recently when to expand some 386DXs to 8MB
- >to run the Oct beta. They trashed ever few minutes. A quick look-see points
- >to several problems in the memory area: 1 not enought decoupling caps for the
- >SIMMS and driver, 2 power plane has too high an impedence to source the several
- >amps needed for the ?? nsec as the memory access starts. 3 undershoot in the
- >RAS/CAS lines. Result is flaky memory system. BTW, this is not just on NT,
- >you can't run DOS either.
- >
- >Anyone else seen this?
- >
- >~Paul
- >
-
- When upgrading from 4 to 8MB, we had similar "flaky" operation running Unix.
- We had used 9-chip SIMMs for the first 4MB and 3-chip SIMMS in the second
- 4MB. We sent back the 3-chip SIMMs and got 9-chip SIMMS --- all problems
- went away. It may have been due to refresh problems between 1Mbit and
- 4Mbit chips.
- Tom
-
-