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Article View: comp.sys.ibm.pc.hardware
Article #18821

Re: 386DX/40 VS. 486SX/25

#18821
From: Thomas D. Barrett
Date: Mon, 04 Jan 1993 18:07
34 lines
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In article <1993Jan4.141635.27338@dvorak.amd.com> tdbear@dvorak.amd.com (Thomas D. Barrett) writes:
>Choose the board with the fastest main memory access time... NOT clock
>speed.

Sorry for the missing stuff (it's hard getting the brain in gear...
and keeping it there after the hollydays)...

Anyway... I was only talking about the system outside of the CPU and
external cache.  In the case of a huge memory search from cacheable
memory, then you want to have the fastest memory possible since the
cache is not going to do much good (it will be trashing).  In the case
of video accesses, the cache does play a role iff you have the
BIOS/driver cached (like under Windows, OS/2, etc.), but if the video
is out on a slower local bus then the 486 cache may still not mean too
much since the driver might be staled waiting for back-to-back video
accesses to finish.

The ideal test would be to figure out your most typical activity which
takes a painful amount of time and see which system is better.
Barring this, your next bet is to look over the various magazine
benchmarks for something which comes close and trust it.  You can also
buy one of the system benchmark packages which best matches your needs
(it should show system performance... a windows system, NOT just
video, benchmark is good if you use windows apps) and go to the dealer
and ask if you can run it (protect your disks from viruses).  The last
suggestion on the list is to trust a dealer for the results.

Tom

-- 
|Tom Barrett (TDBear), Sr. Engineer|tom.barrett@amd.com|v:512-462-6856 |
|AMD PCD MS-520 | 5900 E. Ben White|Austin, TX  78741  |f:512-462-5155 |
|"No is yes, And we're all free"   |CO made a #2 no-no... PU!          |
|My views are my own and may not be the same as the company of origin  |
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Message-ID: <1993Jan4.180743.7134@dvorak.amd.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!olivea!veritas!amdcad!dvorak.amd.com!tdbear
References: <4566.73.uupcb@hal9k.ann-arbor.mi.us> <1993Jan4.141635.27338@dvorak.amd.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!olivea!veritas!amdcad!dvorak.amd.com!tdbear
From: tdbear@dvorak.amd.com (Thomas D. Barrett)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: 386DX/40 VS. 486SX/25
Message-ID: <1993Jan4.180743.7134@dvorak.amd.com>
Date: 4 Jan 93 18:07:43 GMT
References: <4566.73.uupcb@hal9k.ann-arbor.mi.us> <1993Jan4.141635.27338@dvorak.amd.com>
Organization: Advanced Micro Devices, Inc.; Austin, Texas
Lines: 34