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- Path: sparky!uunet!olivea!charnel!sifon!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!ai-lab!zurich.ai.mit.edu!pshuang
- From: pshuang@zurich.ai.mit.edu (Ping Huang)
- Newsgroups: comp.sys.intel
- Subject: Re: 68000 vs Intel Hardware Costs
- Message-ID: <PSHUANG.92Nov22003141@freeside.ai.mit.edu>
- Date: 22 Nov 92 08:31:41 GMT
- References: <fbaglew.276@cs-acad-lan.Lakeheadu.Ca>
- Organization: M.I.T. Artificial Intelligence Lab.
- Lines: 47
- NNTP-Posting-Host: freeside.ai.mit.edu
- In-reply-to: fbaglew@cs-acad-lan.Lakeheadu.Ca's message of 20 Nov 1992 04:06:46 GMT
-
-
- > I am attempting to quantify the difference in hardware costs to outfit
- > administrative assistants with PCs/Macs of `equal' power.
- >
- > Is it reasonable to assume that I can compare Motorola & Intel driven
- > systems on the usual sorts of things - MHz, cache size, w/wo FPU, bus
- > widths, etc?
-
- No. You cannot compare across different CPU lines and different computer
- architectures by using simplistic measures like Mhz, cache size, etc.
- You can't say that a PC compatible using a 386 CPU at 33Mhz is "clearly"
- twice as fast as a Macintosh LC-II at 16Mhz, because that is not
- necessarily the case. How much benefit you get from cache sizes even
- within the same CPU line depends greatly on the operating system and the
- kind of applications you are running, and PC's and Macintoshes are
- disparate in those respects. I suppose the presence and lack of FPU's is
- something you can consider to make equivalent amount of difference,
- relatively speaking, for both PC's and Macintoshes, but that doesn't
- mean that you'll obtain the same amount of performance boost by adding
- an FPU in both cases. And with respect to the expansion bus, comparing
- ISA, EISA, MCA, and PCI- and VL-local buses on the PC side with Nubus,
- SCSI, and Direct Processor Expansion slots on Macintoshes would be
- comparing apples and oranges, for the most part.
-
- Think about what you are trying to do. I won't try to argue that
- "administrative" assistants don't need powerful machines, but they, like
- most computer users, are interested in how much productive throughput
- they get from the machine for the kind of software that they run and not
- the raw specs (yeah, the raw specs are easier to compare and get --
- speaking of which, I've never seen any "SPECmarks" published for Macs
- for A/UX). Unfortunately, there are no studies I know of which try to
- document how much of a difference the "speed" of your machine makes in
- your productivity, given the same product line and software/OS (e.g. it
- might be the case that for Macintoshes, doubling the raw speed would
- nearly double user throughput, but on PC's doubling raw speed would only
- improve user throughput by 1.5, *OR* vice versa). This information would
- allow you to understand how much value you get for your money as you get
- spluftier and spluftier models within each line, and then you would have
- to establish some cross-platform baseline.
-
- It also seems to me that extensive discussion of this issue doesn't
- really belong in this newsgroup, but I don't know where to redirect.
-
- --
- | Ping Huang (INTERNET: pshuang@martigny.ai.mit.edu) speaking for himself.
- | "One Thing to name them all, One Thing to define them,
- | One Thing to place them in environments and bind them..."
-