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From: lowey@herald.usask.ca (Kevin Lowey)
Newsgroups: comp.sys.ibm.pc,comp.sys.ibm.pc.misc,comp.sys.ibm.pc.hardware
Subject: Re: Whis is fastest 386/33 or 486/25 ?
Message-ID: <1990Jul11.161138.13630@dvinci.usask.ca>
Date: 11 Jul 90 16:11:38 GMT
References: <1990Jul5.205440.23370@ecn.purdue.edu>
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From article <1990Jul5.205440.23370@ecn.purdue.edu>, by jmoore@cidmac.ecn.purdue.edu (James D Moore):
> 
> I was asked to find out some information for a professor here at
> the university. A project we are doing requires nothing more than
> as much speed as possible from the processor. I realize that this
> is related to disk acess and such but the basic question I need an
> answer for is "Which is faster a 386/33mhz or a 486/25mhz?"


I have a benchmark program that I wrote which does a lot of tests including
the sieve, fibonacci, whetstone, integer math, floating math, 
trancendental math, etc.  It was done in Turbo Pascal 3.0 so the compiler
does no math optimizations, etc.  Here are some of the final results (in
seconds) which I obtained.


Machine Name      CPU    MHz  NO 80x87 With 80x87
IBM Model 80/486  486    25    26.80    10.92
DEC 325c          386    25    46.96          
Zenith 386        386    25    51.25    20.93
IBM P70           386    20    74.92
IBM PS/2 80       386    16    91.66
Compaq 386        386    16    93.07    57.35
Primax 316SX      386sx  16    96.73
IBM PS/2 model 60 286    10   163.89    60.59 
IBM PS/2 model 60 286    10   170.03    65.07    (OS/2 1.1 DOS box)
IBM-AT            286     6   281.65
AT&T 6300        8086     ?   365.64
IBM-XT           8088  4.77   783.56   281.11
Amiga 2000       8088  4.77   797.41             (bridge card)
Mac IIx         68030    16  1309.91             (Soft-PC 1.21 DOS emulation)


That should give you a few comparisons.  Unfortunately I haven't tested
any 33Mhz 386 boxes.  But at the same clock speed, the 486 chip appears to
be about twice as fast as the 386 chip (in real mode at least)

- Kevin Lowey