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- From: (sprague.wbst311@xerox.com)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: 3-chip vs 9-chip SIMMs?
- Message-ID: <1992Dec16.154318.13454@spectrum.xerox.com>
- Date: 16 Dec 92 15:43:18 GMT
- Sender: news@spectrum.xerox.com
- Followup-To: 3-chip vs 9-chip SIMMs?
- Organization: Xerox
- Lines: 23
- Originator: msprague@superior
-
- As far as I know, 9 chip SIMMs have been around longer than the 3 chip
- kind. While 3 chip SIMMs usually cost less, than the 9 chip type, the
- 3 chip type have a bad reputation for not always working right. Their
- refresh requirements were different, and so they wouldn't work with all
- motherboards. I must disagree with the person who called them poorly
- designed motherboards. You can't really expect a motherboard to support
- two different types of refresh at the same time, for what it thinks are
- the same kind of memory!!
-
- The rule of thumb _has_ been that if you can get 9 chip SIMMs, get them
- over the 3 chip kind. On the other hand, if the 3 chip kind were known
- to work in your computer, go for it, as they usually cost a little less.
-
- I wrote the above in the past tense because I read somewhere that the
- manufactures of SIMMs recognized the refresh problems with 3 chip SIMMs,
- and have taken steps to correct them so that there should no longer be
- any problems. Just in case, I would suggest not mixing the kinds in a
- PC, but if it works ... it works.
-
- Note that my PC contains all 3 chip SIMM's (25 MHz 386, with '90 timeframe
- AMI BIOS), and I have not had any trouble with them.
-
- ~ Mike (sprague.wbst311@xerox.com)
-