Date: Tue, 22 Sep 1998 08:38:50 -0600 From: "Mark J. Sommer" <msommer@argotsoft.com> To: freebsd-questions@FreeBSD.ORG Subject: Re: mixing RAM for FreeBSD ? Message-ID: <3.0.3.32.19980922083850.00955a20@mail> In-Reply-To: <19980922080420.B7025@oit.umass.edu> References: <Pine.BSF.3.96.980921045358.4079E-100000@abc.xyz.net> <199809211439.IAA10132@argotsoft.com> <Pine.BSF.3.96.980921045358.4079E-100000@abc.xyz.net>
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At 08:04 AM 9/22/98 -0400, Greg Pavelcak wrote: >On Mon, Sep 21, 1998 at 04:56:48AM -0800, groggy@iname.com wrote: >> >> > Another thing to keep in mind is that if you can mix, you'll probably slow >> > your system down. Most motherboards that allow mixing will run at the slower >> > SIMM speeds. I.e. SDRAM typically less than or equal to 12ns, SIMMs typically >> > less than or equal to 60ns, the result is the overall machine will run its >> > memory bus at the 60ns mark. >> >> i wonder is 12ns is overkill. i haven't done any calculations, >> but i wonder if the RAM could be accessed fast enough to take >> advantage of that speed. >> >> ? >Seems to me I read somewhere that the 10/12ns numbers associated >with SDRAM was a marketing ploy. Not that the numbers are >inaccurate, just that the thing being measured at 12ns is *not* >the same thing that is measured at 60ns in the SIMMS. When you >start comparing apples/apples, the numbers are more like 55ns vs. >60ns. > >Or maybe this is a false memory. > >Greg You could be right and I'm more than willing to be educated. Anybody know? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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