Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!rpi!dorsai
From: dorsai@iear.arts.rpi.edu (gregory d moncreaff)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Speed of RAM
Keywords: speed, RAM
Message-ID: <2fkgv6n@rpi.edu>
Date: 16 Apr 91 05:15:16 GMT
References: <1991Apr15.134754.7239@swsrv1.cirr.com> <1991Apr15.233221.18417@amd.com>
Organization: the committee for asethetic deletions
Lines: 37
Nntp-Posting-Host: iear.arts.rpi.edu

In article <1991Apr15.233221.18417@amd.com> phil@brahms.amd.com (Phil Ngai) writes:
>toma@swsrv1.cirr.com (Tom Armistead) writes:
>
>>Could someone tell me how to figure what the speed of RAM needs to be for
>>different speed of PC's.
>
>It's very simple. Get the manual for the motherboard and read it.
>
>"Could someone tell me how to figure out what size tires you need for
>different model of cars?"

lighten UP!

please. all the guy seemed to want to know was what the general relation 
between processor chip clock speed (MHz) and the access time (ns) required
for the rams. while it is all very well to sit there and say RTFM over and
over, you do little to fufill the needs of many of the usenet community. Mr
Armistead may well have a motherboard manual or two at his disposal but that
would prove insufficient for answering a question of the bredth which he set
forth. Mr Artmistead would require motherboard manuals for xt's at's 386sx
386's and 486's

as for the requested information, i believe that anything running under 12MHz
should be able to use 100ns rams. i have seen 80ns rams used from 16Mhz 386sx
and 20MHz 286 upto 25MHz. this is from practical, life experience.

getting theoretical, on the other hand, my memory controller, in a 386sx-16Mhz
board, the 82c212, says that it will support 0 wait states with 120ns ram. as
the motherboard was sent to me with 80ns rams on it i am slightly confused.

perhaps Mr Ngai can enligten us?

-- 
"A perfect democracy, a 'warm body' democracy in which every adult may vote and
all votes count equally, has no internal feedback for self-correction. It de-
pends solely on the wisdom and self restraint of citizens ... which is opposed
by the folly and lack of self-restraint of other citizens. What is supposed to