Date: Wed, 4 Mar 1998 20:40:12 -0500 (EST) From: Andrew Herdman <andrew@whine.com> To: Jin Guojun <jin@george.lbl.gov> Cc: jas@flyingfox.com, jonny@coppe.ufrj.br, hardware@FreeBSD.ORG, mike@smith.net.au Subject: Re: TX Chipset and more than 64M Ram Message-ID: <Pine.BSF.3.96.980304203703.23810A-100000@why> In-Reply-To: <199803042243.OAA01989@george.lbl.gov>
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On Wed, 4 Mar 1998, Jin Guojun wrote:
>Jim Shankland (jas@flyingfox.com) wrote:
>: > [AMD K6 not supported with HX PCIset]:
>: > Yes, K6. I had P55T2P4 Rev 3.10. So, it is included in range ( > 3.1),
>: > right ?
>:
>: I have several P55T2P4-based systems running with 200 MHz K6's.
>: They work fine. Did you mean the 233 MHz K6 only?
>
>No. They are 166/200 MHz K6s. Maybe you get better (later) Revision of MB?
>or different CPU Rev.? My CPU Rev is 9744??.
>Or maybe my P55T2P4 Rev 3.10 means 3.one not 3.ten. Any ideas?
>
> -Jin
>
>To Unsubscribe: send mail to majordomo@FreeBSD.org
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>
The ASUS T2P4 will support the K6 233 and most likely the 266 as well.
Problem with most 3.1 versions is they can't produce the 3.2v required
for the core of the 233 K6. I'm following this e-mail with a post
from the asus newsgroup showing how to set the core voltage to whatever
you want.
Also note that ASUS now ships the T2P4 with 3.2v capabilities, just look
for the "3.2v Ready" sticker.
And to reflect the general sentiment, the TX chipset just plain sucks.
Andrew
---------------------------------------------------------------------------
Many of you have been desperately awaiting this day: I'm going
to retire from this group (because otherwise I would never get
my study to finish). But don't halloo till you're out of the wood,
I'll return one fine day.
Thanks to all out there who shared their knowledge or their
problems with me. I really had a great time and I'm happy I could
listen and talk to so many helpfull souls, including...
Tony B., Mike Barnard, Jean-Sebastien Chillet, T.C. Goh,
Imre Hethely, KALLE, Dietmar Klaehn, Joachim Klein, Frank Ledwon,
Rick Lindsay, Thomas Gustav Mosher, Ron Reaugh, Colin Saunders,
Paul F. Schikora, Dave Tatosian, John Welter, ...
and the dozens I forgot to mention.
O.K. here is my last gift for all those who have a T2P4 rev. 3.0
or newer and worry about future CPUs. A complete table of the
core voltages available with this beautifull board (without any
soldering). In fact, I made three different tables (all presenting
the same data or subsets) for most convenient access.
'0' = jumper set, '1' = jumper not set
Table 1: sorted by jumper settings
3.2 2.9 2.8 2.7 2.5 resulting Vcore
=======================================================
0 0 0 0 0 3.30V
0 0 0 0 1 2.50V
0 0 0 1 0 2.70V
0 0 0 1 1 2.24V
0 0 1 0 0 2.83V
0 0 1 0 1 2.30V
0 0 1 1 0 2.44V
0 0 1 1 1 2.12V
0 1 0 0 0 2.89V
0 1 0 0 1 2.33V
0 1 0 1 0 2.47V
0 1 0 1 1 2.13V
0 1 1 0 0 2.57V
0 1 1 0 1 2.18V
0 1 1 1 0 2.28V
0 1 1 1 1 2.03V
----------------------------------------------------
1 0 0 0 0 3.20V
1 0 0 0 1 2.46V
1 0 0 1 0 2.64V
1 0 0 1 1 2.22V
1 0 1 0 0 2.77V
1 0 1 0 1 2.28V
1 0 1 1 0 2.41V
1 0 1 1 1 2.09V
1 1 0 0 0 2.81V
1 1 0 0 1 2.29V
1 1 0 1 0 2.43V
1 1 0 1 1 2.11V
1 1 1 0 0 2.52V
1 1 1 0 1 2.15V
1 1 1 1 0 2.26V
1 1 1 1 1 2.01V
----------------------------------------------------
Note: The lower part of the table is valid only for boards that
have the '3.2V O.K.' sticker or the revised silk screening. ASUS
has made different versions of 3.0 and 3.1 boards before
(different values for R140) and those might deliver 2.5V, 2.6V or
3.1V or whoknows V when pins 9 and 10 are shorted. However, the
values in the upper part should apply to ALL 3.0 and 3.1 boards.
Table 2: sorted by Vcore (3.2/res always off), for all rev. 3.0 & 3.1
3.2 2.9 2.8 2.7 2.5 resulting Vcore
=======================================================
0 1 1 1 1 2.03V
0 0 1 1 1 2.12V
0 1 0 1 1 2.13V
0 1 1 0 1 2.18V
0 0 0 1 1 2.24V
0 1 1 1 0 2.28V
0 0 1 0 1 2.30V
0 1 0 0 1 2.33V
0 0 1 1 0 2.44V
0 1 0 1 0 2.47V
0 0 0 0 1 2.50V
0 1 1 0 0 2.57V
0 0 0 1 0 2.70V
0 0 1 0 0 2.83V
0 1 0 0 0 2.89V
0 0 0 0 0 3.30V
Table 3: sorted by Vcore (all jumpers), for latest rev. 3.1 boards
3.2 2.9 2.8 2.7 2.5 resulting Vcore
=======================================================
1 1 1 1 1 2.01V
0 1 1 1 1 2.03V
1 0 1 1 1 2.09V
1 1 0 1 1 2.11V
0 1 0 1 1 2.13V
1 1 1 0 1 2.15V
0 1 1 0 1 2.18V
1 0 0 1 1 2.22V
0 0 0 1 1 2.24V
1 1 1 1 0 2.26V
0 1 1 1 0 2.28V
1 0 1 0 1 2.28V
0 0 1 0 1 2.30V
0 1 0 0 1 2.33V
1 0 1 1 0 2.41V
1 1 0 1 0 2.43V
0 0 1 1 0 2.44V
1 0 0 0 1 2.46V
0 1 0 1 0 2.47V
0 0 0 0 1 2.50V
1 1 1 0 0 2.52V
0 1 1 0 0 2.57V
1 0 0 1 0 2.64V
0 0 0 1 0 2.70V
1 0 1 0 0 2.77V
1 1 0 0 0 2.81V
0 1 0 0 0 2.83V
0 1 0 0 0 2.89V
1 0 0 0 0 3.20V
0 0 0 0 0 3.30V
To achieve voltages between 2.9V and 3.2/3.3V you can place a
resistor between the pins that you would normaly short to get
2.9V. The following drawing is stolen from a posting by KALLE,
and represents a rev. 3.0 board:
Voltage Sense
\
2,5V O O---85KOhm---Ground
\
2,7V O O--130KOhm---Ground
\
2,8V O O--180KOhm---Ground
\
2,9V O O--210KOhm---Ground
\
res. O O---85KOhm---Ground (1MOhm for the latest 3.1 boards)
Placing 800 kOhm over the pins for 2.9V will give 3.2V, for 3.1V
you should try a value around 470 kOhm, for 3.0V something like
270 kOhm.
Do I really have to add this?
DISCLAIMER OF WARRANTY:
All measurements have been made on my personal T2P4, using a quality
multimeter with my P200-MMX put in (didn't boot at 2.01V of course,
what did you expect?). I did my best to transfer my results to
paper an then to the keyboard, but you never know. If you destroy
any piece of your hardware, it's your own fault. I did not measure
the core voltage directly at the CPU socket (as proposed by Intel
and AMD), but between the middle Pin of J17 and ground. The difference
should however be neglectable.
Still any questions? Feel free to contact me.
Bye
Fabian
--
------------------------------------------------------------------------
cand. ing. Fabian X. Robok _/ _/ _/ _/_/_/_/
Institut fuer Kommunikationsakustik _/ _/ _/ _/ _/
Ruhr-Universitaet Bochum _/ _/_/ _/_/_/_/
_/ _/ _/ _/ _/
Phone: +49 234 700 5388 _/ _/ _/ _/ _/
------------------------------------------------------------------------
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