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Article #716

Re: Help! - IBM 486 Blue Lightning system - performance and upgrade queries

#716
From: Wayne Willcox
Date: Wed, 20 Dec 1995 00:00
65 lines
3816 bytes
In article <4ag9q0$qdo@news.dx.net>,
Stephen Scheiding <sparky@ACEINFO.COM> wrote:
>john@rm101.demon.co.uk (jc) wrote:
>
>>On Wed, 29 Nov 1995 22:22:42 GMT, jason@thainjm.demon.co.uk wrote:
>
>>This is the same system that i had
>>I upgraded mine by replacing the motherboard (well everything really
>>I found most digitised sound did not work even with different sound
>>cards.
>
>>Although windows performance was quite good (as good as a DX266) but
>>dos was poor compared to a dx266
>
>>Anyway best thing to do is bin it, and get a new board and processor
>
>
>
>>John
>
>The blue lightning board otherwise known as a cobalt mb and produced
>for ibm by alaris is a piece of absolute dog shit. It is not a true

I think you mean that the board is built by IBM for Alaris. Not the 
other way around. 

>vlb board in that it doesn't comply with all vesa standards.  It is

Which VESA standard does it not comply with? My understanding which
is pretty good is the board is VESA compliant.

>very picky which video board it will accept and be able to run
>anything other than generic vga.  when I contacted the tech service
>(in new jersey i think) he indicated that ibm knew of the problems
>before shippment but " it was too late to turn back:".  I only got to
>this point after unjustly accusing mitac corp of making  aproblem
>board and consequently being shifted to a S3 tech who thought he had
>heard rumors who then sent me to alaris for confirmation. an ordeal to

This board uses the Opti VESA controller chip that is old ( the board is
in fact 3 years old) and does not work well with the S-3, and most of the
new accelarated video drivers, for example the ones that come with win95
seem to work reliably. Did you try some of the generic S-3 drivers for 
the older MB's?

>steve
>

Just my .02 cents worth, I have used them as Lan Server 3.0 and 4.0 
domain controllers in the past, I used high res with the cirus logic
chips, and the ATI chips, I installed win95 and used an S-3 card that
did not work in windozes 3.11 and that also worked. Performance was 
acceptable for the era.
Now to answer the orginal posters question, the P24T is not a great 
performer it is about equal to a DX4/100, this is about 20% faster then
the Blue Lighting, but that is the total after you add the disk delays
and video speed you probabaly only see about a 5 to 10% gain, not a 
good buy. To get better performance either use the 83Mhz OD or you can
use the 486 DX/120 with a voltage regulater since the ZIF socket on this
board is a 486 5 volt socket.
-- 
Slowly and surely the unix crept up on the Nintendo user ...
Wayne Willcox                          I will not eat green eggs and ham
wayne@obiwan.pmr.com                      I will not eat them Sam I Am!!
wayne@obiwan.pmr.com (or obiwan%wayne@uunet.uu.net)
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From: wayne@obiwan.uucp (Wayne Willcox)
Subject: Re: Help! - IBM 486 Blue Lightning system -  performance and upgrade queries
Date: 1995/12/20
Message-ID: <DJwD2p.C5G@obiwan.uucp>
X-Deja-AN: 122378326
references: <817683634.8776@thainjm.demon.co.uk> <818457899.9472@rm101.demon.co.uk> <4ag9q0$qdo@news.dx.net>
organization: Bob's Place, Austin TX
newsgroups: comp.sys.ibm.pc.hardware.chips,comp.sys.ibm.pc.hardware.misc,comp.sys.ibm.pc.hardware.systems,comp.sys.ibm.pc.misc,demon.tech.pc