28 Oct
2002
28 Oct
'02
5:38 p.m.
Are they ALL DX2-50's? I'm looking for a
DX-50.
I'll double check, but yeah, I am pretty sure these 4 are DX2-50.
I also have a small stack of 486 CPUs (cpu chip only), and there might be
a regular DX in there (I know there are some SX and DX2's... as well as a
few that the chip is glued to the heatsink, so I'm not sure what they are)
-chris
<http://www.mythtech.net>
28 Oct
28 Oct
7:30 p.m.
On Tue, 29 Oct 2002, chris wrote:
If your board can accept one, a DX2-66 performs better than a DX50. The
DX2-66 only has a 33MHz clock, but if the motherboard has VLB slots, a
33MHz bus is a must, since anything faster causes timing problems. (A
40MHz bus can be made to work, but it isn't fun...) If the board has an
oscillator can or speed selection jumpers, it should be easy to use a
DX2-66 instead of a DX50.
-Toth
Are they ALL
DX2-50's? I'm looking for a DX-50.
I'll double check, but yeah, I am pretty sure these 4 are DX2-50.
I also have a small stack of 486 CPUs (cpu chip only), and there might
be a regular DX in there (I know there are some SX and DX2's... as well
as a few that the chip is glued to the heatsink, so I'm not sure what
they are) 
10:03 p.m.
----- Original Message -----
From: "Tothwolf" <tothwolf(a)concentric.net>
To: "Classic Computer" <cctalk(a)classiccmp.org>
Sent: Tuesday, October 29, 2002 4:33 AM
Subject: Re: Anyone need 486 motherboards?
On Tue, 29 Oct 2002, chris wrote:
If your board can accept one, a DX2-66 performs better than a DX50. The
DX2-66 only has a 33MHz clock, but if the motherboard has VLB slots, a
33MHz bus is a must, since anything faster causes timing problems. (A
40MHz bus can be made to work, but it isn't fun...) If the board has an
oscillator can or speed selection jumpers, it should be easy to use a
DX2-66 instead of a DX50.
If anyone's interested, a local ebayer (Columbus, Ohio) has some Kingston
133MHz 486 upgrade chips, currently $2.50ea in a dutch auction. They appear
to be new, no dust or signs of removal, and they are in a retail-looking
plastic package. No paper insert though. Search for seller
`dotcomliquidations'.
No interestes other than a satisfied customer.
Are they
ALL DX2-50's? I'm looking for a DX-50.
I'll double check, but yeah, I am pretty sure these 4 are DX2-50.
I also have a small stack of 486 CPUs (cpu chip only), and there might
be a regular DX in there (I know there are some SX and DX2's... as well
as a few that the chip is glued to the heatsink, so I'm not sure what
they are)
-Toth
Bob
11:43 p.m.
Hmmm, are you sure about this?
A 'real' DX-50 will clean the clock of a DX2-66, due to the true 50 Mhz bus.
If your seeing a DX2-66 beat a DX-50, then the DX-50 is not being run at
full (local bus) speed.
I've got a (large) pile of NEC EISA servers that take plug-in CPU cards,
so its easy to swap between
the DX2-66 and DX-50 while keeping the same BIOS and chipset. The DX-50
is clearly faster.
(I'd love to not have this pile of servers, NEC PowerMate Express A7x's,
in both desktop and tower chassis)
Tothwolf wrote:
On Tue, 29 Oct 2002, chris wrote:
If your board can accept one, a DX2-66 performs better than a DX50. The
DX2-66 only has a 33MHz clock, but if the motherboard has VLB slots, a
33MHz bus is a must, since anything faster causes timing problems. (A
40MHz bus can be made to work, but it isn't fun...) If the board has an
oscillator can or speed selection jumpers, it should be easy to use a
DX2-66 instead of a DX50.
-Toth
Are they
ALL DX2-50's? I'm looking for a DX-50.
I'll double check, but yeah, I am pretty sure these 4 are DX2-50.
I also have a small stack of 486 CPUs (cpu chip only), and there might
be a regular DX in there (I know there are some SX and DX2's... as well
as a few that the chip is glued to the heatsink, so I'm not sure what
they are)
29 Oct
29 Oct
1:49 a.m.
At 08:47 AM 10/29/02 -0500, you wrote:
Hmmm, are you sure about this?
A 'real' DX-50 will clean the clock of a DX2-66, due to the true 50 Mhz bus.
If your seeing a DX2-66 beat a DX-50, then the DX-50 is not being run at
full (local bus) speed.
I second this opinion, at least if running Linux. I never made that
speed test under Winblows. This was in a machine with a 512K L2 cache;
the local bus speed could be configured to 33MHz, 40MHz and 50MHz.
Right now my daughter uses that machine, but it doesn't have that
486DX50 anymore; now it has one of those 3X/4X AMD 486 replacements
sold by PowerLeap; I think it is running at 3X with a bus speed of 40MHz,
for a 120MHz internal clock [1]. Quite speedy for a 486.
[1] Another test revealed that the combination 40MHz local/120MHz internal
was substantially faster than 33MHz local/133MHz internal. I would
have tried 50MHz local/100MHz internal, but I think it wasn't supported.
I suspect it might have been even faster. Another case of raw
internal clock speed not being an appropriate measure of system performance.
carlos.
--------------------------------------------------------------
Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
4 Nov
4 Nov
11:53 a.m.
From: Bob Shannon <bshannon(a)tiac.net>
To: cctalk(a)classiccmp.org
Subject: Re: Anyone need 486 motherboards?
Reply-to: cctalk(a)classiccmp.org
Date: Tue, 29 Oct 2002 08:47:46 -0500
Hmmm, are you sure about this?
A 'real' DX-50 will clean the clock of a DX2-66, due to the true 50 Mhz bus.
If your seeing a DX2-66 beat a DX-50, then the DX-50 is not being run at
full (local bus) speed.
I've got a (large) pile of NEC EISA servers that take plug-in CPU cards,
so its easy to swap between
the DX2-66 and DX-50 while keeping the same BIOS and chipset. The DX-50
is clearly faster.
(I'd love to not have this pile of servers, NEC PowerMate Express A7x's,
in both desktop and tower chassis)
Tothwolf wrote:
In a pinch,
Take a few AMD 486DX 40 CPUs and overclock them to 50 with active
cooling to find one or two that works 100%. They did take that well.
I had one like that. and real 50MHz was a real treat too.
Cheers,
Wizard
30 Oct
30 Oct
12:43 a.m.
On Tue, 29 Oct 2002, Tothwolf wrote:
If your board can accept one, a DX2-66 performs better than a DX50. The
DX2-66 only has a 33MHz clock, but if the motherboard has VLB slots, a
33MHz bus is a must, since anything faster causes timing problems. (A
40MHz bus can be made to work, but it isn't fun...) If the board has an
oscillator can or speed selection jumpers, it should be easy to use a
DX2-66 instead of a DX50.
I am looking specifically for a DX-50 for something special.
Peace... Sridhar
Are they ALL DX2-50's? I'm looking for a
DX-50.
I'll double check, but yeah, I am pretty sure these 4 are DX2-50.
I also have a small stack of 486 CPUs (cpu chip only), and there might
be a regular DX in there (I know there are some SX and DX2's... as well
as a few that the chip is glued to the heatsink, so I'm not sure what
they are)
28 Oct
28 Oct
8:18 p.m.
On Tue, 29 Oct 2002 vance(a)neurotica.com wrote:
On Tue, 29 Oct 2002, Tothwolf wrote:
Out of curiosity, what kind of application do you have planned for one?
If Chris doesn't have a DX-50 in his inventory, I'll check mine, as I
*might* still have a lone DX-50 packed away.
-Toth
If your board can accept one, a DX2-66 performs
better than a DX50.
The DX2-66 only has a 33MHz clock, but if the motherboard has VLB
slots, a 33MHz bus is a must, since anything faster causes timing
problems. (A 40MHz bus can be made to work, but it isn't fun...) If
the board has an oscillator can or speed selection jumpers, it should
be easy to use a DX2-66 instead of a DX50.
I am looking specifically for a DX-50 for something special.
11:38 p.m.
DX2-50 does not equal DX-50.
I've got some 'real' DX-50's, if thats what you need.
chris wrote:
Are they ALL
DX2-50's? I'm looking for a DX-50.
I'll double check, but yeah, I am pretty sure these 4 are DX2-50.
I also have a small stack of 486 CPUs (cpu chip only), and there might be
a regular DX in there (I know there are some SX and DX2's... as well as a
few that the chip is glued to the heatsink, so I'm not sure what they are)
-chris
<http://www.mythtech.net>
8089
days inactive
8095
days old
8 comments
7 participants
participants (7)
-
bshannon＠tiac.net -
carlos_murillo＠epm.net.co -
cb＠mythtech.net -
jpero＠sympatico.ca -
rschaefe＠gcfn.org -
tothwolf＠concentric.net -
vance＠neurotica.com