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- Path: sparky!uunet!elroy.jpl.nasa.gov!usc!zaphod.mps.ohio-state.edu!uwm.edu!biosci!UCLAUE.MBI.UCLA.EDU!DULANEY
- From: DULANEY@UCLAUE.MBI.UCLA.EDU
- Newsgroups: bionet.software
- Subject: Re: PC 80486
- Message-ID: <7AE0A53B6030382D@uclaue.mbi.ucla.edu>
- Date: 26 Jan 93 04:50:00 GMT
- Sender: daemon@net.bio.net
- Distribution: bionet
- Lines: 55
-
- !!In article <1993Jan25.090410.12066@gserv1.dl.ac.uk>,
- !!schnorr@tournesol.versailles.inra.fr (Kirk Schnorr) writes:
- !!|> I was wondering if anyone out there could inform me about the relative
-
- [ much good discussion deleted to which John Penniston aptly replied]
-
- !Chip Internal External Floating
- !Designation Data Path Data Path Point Unit?
- !----------- --------- --------- -----------
- !386DX 32 bits 32 bits No
- !386SX 32 bits 16 bits No
- !
- !486DX 32 bits 32 bits Yes
- !486SX 32 bits 32 bits No
- ! As you can see, Intel changed the meaning of "SX" between the 386
- !and 486 chips.
-
- I'd just like to add a bit more to the pot.
- Run @ 2X
- Chip Internal External Floating 8K Internal speed
- Designation Data Path Data Path Point Unit? Cache internally?
- ----------- --------- --------- ----------- ----------- ----------
- 386SX 32 bits 16 bits No No No
- 386DX 32 bits 32 bits No No No
-
- 486SX 32 bits 32 bits No Yes No
- 486DX 32 bits 32 bits Yes Yes No
- 486DX2 32 bits 32 bits Yes Yes Yes
- ^^^^^^^^^^^^^^^^^^^^^^^
- additional speed boosts
-
- Does any of this speak to the point of which processor you should buy? Not
- really. Most software (90%) is written to run on 16 bit processors. I think
- windows 3.1 now incorporates a little 32 bit code but not much. Some of the
- newest windows programs incorporate 32 bit code but again not much. NO
- software, to my knowledge, have been written that REQUIRE the 486 chip. A 386
- machine with a 387 math coprocessor is identically functional (as far as
- software is concerned, though you might notice a slight speed difference) to a
- 486 chip. Furthermore, currently very few programs utilize the math
- coprocessor portion of the 486, though this may change rapidly. The primary
- advantage of a 486 over a 386 is SPEED.
-
- SO... what should you do? As always, the decision boils down to dollars.
- Buy the most powerfull machine you can comfortably afford. I'd shy from 386SX
- but other than that, 32 bits is 32 bits. You may opt to buy a (slightly)
- cheaper 386 but purchase more RAM so you can multitask in Windows more easily
- or you could add a tape drive to facilitate backups. Certainly, if you can
- afford it, you would want to buy a MEGA PC with 80486, 32 MB RAM, 600 MB hard
- drive, tape backup, etc, but, for most, the decision is a big balancing act.
- I hope I haven't complicated things too much. :) Just my 2c.
-
- Tom Dulaney
- Graduate Student
- Molecular Biology Institute
- University of California, Los Angeles
-