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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!caen!chyang
- From: chyang@panthro.engin.umich.edu (Chung Hsiung Yang)
- Subject: Re: P5 v. PowerPC (WAS: Where the mac really wins)
- Message-ID: <-ZR=0p+@engin.umich.edu>
- Date: Fri, 11 Dec 92 14:52:46 EST
- Organization: University of Michigan Engineering, Ann Arbor
- References: <1992Dec4.021231.42032@datamark.co.nz> <ByrH1K.GKx@hfglobe.intel.com> <WAGNER.92Dec10161223@grace.math.uh.edu> <1992Dec11.092332.16609@etek.chalmers.se>
- Originator: chyang@panthro.engin.umich.edu
- Nntp-Posting-Host: panthro.engin.umich.edu
- Lines: 51
-
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- In article <1992Dec11.092332.16609@etek.chalmers.se>, janolov@cdg.chalmers.se (Jan-Olov Lantto) writes:
- > In article <WAGNER.92Dec10161223@grace.math.uh.edu> wagner@grace.math.uh.edu
- > (David Wagner) writes:
- > >This is just my two bits, and it is said in hindsight, but if Apple were
- > >to make this kind of arrangement today, I would say that they ought
- > >to use the Alpha chip. From what I know of it, (which ain't all that
- > >much) it seems ideal for emulations. If it can run OSF and VMS, then
- > >(IMHO) it ought to be able to do `Mac' and MC680XX pretty well. Of
- > >course then we'd all have to be 64-bit clean, I guess.
- > >
- > >I sure hope the PowerPC won't have to use IBM `Power'-style
- > >memory boards. Those things cost an arm and a leg!
- > >
- > >David H. Wagner "Buy the truth and do not sell it."
- > > Proverbs 23:23a
- > >
- > There are some big differences between PowerPC and Alpha, that makes Alpha
- > unsuitible as a chip for PC s.
- >
- > 1. Chip area. Smaller chip area = lower production cost = cheap computers.
- > 2 Power consumption. Low power consumption = can be used in notebooks.
- >
-
- ??????????????????????????????????????????????????????????
-
- DEC Alpha's are is made with sub-micrometer technology. I believe
- it is something like 0.7 micron technology, which allows the chip voltage
- voltage to be 0 - 3.3 V (compared to 0-5v for most of the PC chips today).
- The high integration also allows the chip to operate at 200MHZ. At that
- speed, yes you will produce lots of heat, but if you operate the chip at
- a lower frequency (50MHZ or lower) The power consumpstion comparable to
- pretty much any PC-microchip on the market today.
-
- For notebooks, you could include power management, by varing the
- speed of the processor - to slow down the clock speed when the processor
- sits idle. But using DEC Alpha in notebooks would be an overkill, I agree.
-
- - Chung Yang
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- - - - - - - - - - - - - - - - - -
- > Jan-Olov Lantto - Research Engineer
- > Dept. of Electrical Power Systems
- > Chalmers University of Technology
- > S-412 96, Goteborg, SWEDEN
- > - - - - - - - - - - - - - - - - - -
- > janolov@cdg.chalmers.se
-