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From: d87-mal@oddjob.nada.kth.se (Mats Lfkvist)
Newsgroups: comp.unix.bsd
Subject: Re: The ultimate 386BSD machine? (FAQ fodder)
Message-ID: <D87-MAL.92Oct9193909@oddjob.nada.kth.se>
Date: 9 Oct 92 18:39:09 GMT
References: <1992Oct8.072512.8700@elroy.jpl.nasa.gov>
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Followup-To: comp.unix.bsd
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 19
In-Reply-To: earle@elroy.jpl.nasa.gov's message of Thu, 8 Oct 1992 07:25:12 GMT
Nntp-Posting-Host: oddjob.nada.kth.se
In article <1992Oct8.072512.8700@elroy.jpl.nasa.gov> earle@elroy.jpl.nasa.gov (Greg Earle - Gainfully Unemployed) writes:
- I have seen some benchmarks whereby a 486DX2/66 outperforms a 486DX/50. But
I saw a posting by Barry Shein that indicated that due to the bus speed on
the former being only 33 MHz, this would not be a good idea as doing things
like bitblts in X would be faster on a "native" 50 MHz system. This seemed
perfectly reasonable, so it seems that a 486DX/50 is the best idea. Right?
The bus that matters most for video performance is the bus the video card is
attached to, not the memory bus.
On a PC with ISA bus only, the bus speed won't differ between a DX/50 and
a DX2/66 system. On a local bus system it will differ, but probably the
OTHER way around as the VL bus spec limits the bus speed to 40 MHz
(DX2/66 systems will run at 33 MHz, DX/50 will probably run at 25 MHz).
_
Mats Lofkvist
d87-mal@nada.kth.se