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- Path: sparky!uunet!emba-news.uvm.edu!idx.com!gsk
- From: gsk@idx.com
- Newsgroups: comp.os.os2.misc
- Subject: Re: Mix of 3-chip and 9-chip simms with OS/2
- Message-ID: <1992Dec18.155259.47@idx.com>
- Date: 18 Dec 92 15:52:59 GMT
- References: <L7VqVB5w165w@qed.cts.com> <1gm6deINNjqd@agate.berkeley.edu>
- Organization: IDX Corporation, S. Burlington, VT
- Lines: 33
-
- In article <1gm6deINNjqd@agate.berkeley.edu>, shyguy@ocf.berkeley.edu (David S. Shy) writes:
- > In article <L7VqVB5w165w@qed.cts.com> pyrite@qed.cts.com (Sean Camanyag) writes:
- >>With the Service Pack installed, I get a lot of trap errors, around 8-10,
- >>sometimes more, per day. People at IBM NSC BBS have put the blame on my mix
- >>of 4 3-chip 1mb simms, and 4 9-chip 1mb simms. This is UNACCEPTABLE,
- >
- > kept all the 9's in one bank and all the 3's in the rest) so you
- > might want to check for that.
- >
- > also, if you are mixing different speed simms, that may be your
- > problem (although some people have not experienced any problems
- > under this setup...)
- >
-
- What I have heard is the following. 3 chip simms are ok if your mother-board
- will suppport 4 meg simms, since that is what they really are. It has to do
- with the refresh logic.
-
- 2nd... IF you have different speed rams, you MUST place the SLOWEST rams
- in the lowest address bank. (All simms in the same bank MUST be the same
- speed). The motherboard/bios determins the refresh rate and access rate from
- the first bank. ALL of your ram will then be accessed at this slower rate.
-
- I have followed these rules, have mixed 70ns and 60ns simms, and mixed 9 and 3
- chep versions, and have not had any problem...
-
- So the story goes....
-
- -- George --
-
- ------------------------------------------------------------
- - George Kaczowka IDX Corp Marlboro, MA - gsk@idx.com -
- ------------------------------------------------------------
-