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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.cis.okstate.edu!newsfeed.ksu.ksu.edu!news.mid.net!mr.net!news.clark.net!world1.bawave.com!newsfeed.internetmci.com!in2.uu.net!news-m01.ny.us.ibm.net!news-s01.ny.us.ibm.net!usenet From: madbrain@ibm.net (Julien Pierre) Newsgroups: comp.os.linux.hardware,comp.os.ms-windows.win95.misc,comp.os.os2.setup.misc,comp.unix.bsd.freebsd.misc Subject: Re: HELP: Can I mix memory speeds Date: Thu, 04 Jul 1996 17:48:24 -0400 Organization: Somewhere in Cyberspace Lines: 39 Message-ID: <owD3xQxFKtWK089yn@ibm.net> References: <4rbvq2$34i@news.enterprise.net> <9H22xQxFKt5O089yn@ibm.net> <31dbda61.3882623@newshost.cybertours.com> Reply-To: madbrain@ibm.net NNTP-Posting-Host: slip129-37-246-83.fl.us.ibm.net Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Xref: euryale.cc.adfa.oz.au comp.os.linux.hardware:43351 comp.os.ms-windows.win95.misc:156635 comp.os.os2.setup.misc:16828 comp.unix.bsd.freebsd.misc:22856 Hello ! In article <31dbda61.3882623@newshost.cybertours.com>, juanfine@cybertours.com (John Maguire) wrote: >On Thu, 04 Jul 1996 02:17:33 -0400, madbrain@ibm.net (Julien Pierre) >wrote: > > >>If you get Tyan to answer e-mail, I'd be interested. >>Anyway, you should have no problems with mixing RAM types in different banks. >>I do this with my Tyan Tomcat II : >>- 2 16 MB 60 ns Fast Page SIMMs in bank 0 >>- 2 32 MB 60 ns EDO SIMMs in bank 1 >> >>Works fine. > >Any reason for the EDO being in bank1? It would seem to me that it >should be in bank0 for best performance...or am I missing something? Yes. While the Triton 2 chipset can cache 512 MB of RAM, with the default cache module that came with my board, only 64 MB of RAM can be cached. There is a socket for an additional TAG RAM chip for those who want to cache the full memory range, which I'm planning to get soon. So, I figured it would be best to have the slower non-EDO RAM at the "beginning" of the address space, since it is cached, and the EDO RAM in the 32-96MB range. There are effectively 32MB uncached, but EDO overcomes it a little bit because EDO has some built-in cache along with the RAM. Still, I have benched the RAM at 90MB/S when there is 64MB installed, and it drops to 75MB/s when there is 96MB. -- //---------------------------------------------------------------------------- // Julien R. Pierre // Developer of Digital Sound & Music Interface for OS/2 (DSMI/2) // http://www.netsrq.com/~madbrain - DSMI/2 homepage // http://www.polsci.wvu.edu/Henry/Madbrain - personal page // Certified OS/2 Engineer - Multimedia Developer - 1-941-366-5355