Do the mobile Athlon XP's have on-board temp sensors/diodes?

Doug wrote:
 > I only ask because I just recently replaced my old Barton 2800+ (which was
 > running at 2300Mhz @ 2.125V Vcore) with a Mobile Athlon XP 2600+ (running at
 > 2600Mhz @ 1.875V Vcore) and noticed that speedfan is reporting two temps of
 > around 45 degrees celsius. One of the temps reported is 45 and the other is
 > 46. My old Barton had only one high temperature reading not two. This is all
 > on an Abit NF7S v2.0.
 >
Yes, the mobile Athlon has temperature sensing diode on the chip. It's
pretty easy to tell which of the two temperature sensors you're ready by
putting a heavy load on the CPU (Prime 95 works well for this) and
watching both temperatures. The CPU diode will change very quickly
while the motherboard thermistor will change very gradually.

Doug<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Do the mobile Athlon XP's have on-board temp sensors/diodes? 

"Wes Newell" <w.newell RemoveThis @TAKEOUTverizon.net> wrote in message
news:pan.2005.03.30.07.43.41.775371@TAKEOUTverizon.net...
 > On Tue, 29 Mar 2005 08:50:05 -0800, Doug wrote:
 >
  >> I only ask because I just recently replaced my old Barton 2800+ (which
  >> was
  >> running at 2300Mhz @ 2.125V Vcore) with a Mobile Athlon XP 2600+ (running
  >> at
  >> 2600Mhz @ 1.875V Vcore) and noticed that speedfan is reporting two temps
  >> of
  >> around 45 degrees celsius. One of the temps reported is 45 and the other
  >> is
  >> 46. My old Barton had only one high temperature reading not two. This is
  >> all
  >> on an Abit NF7S v2.0.
 >
 > There are no sensors in the cpu. The sensors are a part of the MB. And
 > btw, both of the cpu's being barton cores are the same inside.
 >
 > --
 > Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
<font color=purple> > My server <a style='text-decoration: underline;' href="http://wesnewell.no-ip.com/cpu.php</font" target="_blank">http://wesnewell.no-ip.com/cpu.php</font</a>>
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 >

You're wrong. Take a look at AMD's data sheet for the Athlon XP's. They
all have an on-die thermal diode. What's done with the signal from the
thermal diode is all handled by the motherboard.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Do the mobile Athlon XP's have on-board temp sensors/diodes? 

That's what I figured. With my old Barton I was monitoring the motherboard
thermistor since it was the highest temp. Now that I've put in the Mobile
Athlon the on-board thermistor is no longer the highest temp because another
temperature magically appeared (in Speedfan 4.12) that reads 7 degrees
farenheit hotter (4 degrees celsius) at idle.

Another strange thing that has happened is that the Counterstrike: Source
VST doesn't load all the models since I made the switch to the Mobile
Athlon, instead I get spinning ERRORs in red.

--
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"Doug Collette" <douglas.p.collette.TakeThisOut@fmr.com> wrote in message
news:ZqF1e.1$O3.22@news-srv1.fmr.com...
 > Doug wrote:
  >> I only ask because I just recently replaced my old Barton 2800+ (which
  >> was running at 2300Mhz @ 2.125V Vcore) with a Mobile Athlon XP 2600+
  >> (running at 2600Mhz @ 1.875V Vcore) and noticed that speedfan is
  >> reporting two temps of around 45 degrees celsius. One of the temps
  >> reported is 45 and the other is 46. My old Barton had only one high
  >> temperature reading not two. This is all on an Abit NF7S v2.0.
  >>
 > Yes, the mobile Athlon has temperature sensing diode on the chip. It's
 > pretty easy to tell which of the two temperature sensors you're ready by
 > putting a heavy load on the CPU (Prime 95 works well for this) and
 > watching both temperatures. The CPU diode will change very quickly while
 > the motherboard thermistor will change very gradually.
 >
 > Doug<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Do the mobile Athlon XP's have on-board temp sensors/diodes? 

On Wed, 30 Mar 2005 12:25:21 +0000, Homer J. Simpson wrote:

 > "Wes Newell" <w.newell.DeleteThis@TAKEOUTverizon.net> wrote in message
  >> There are no sensors in the cpu. The sensors are a part of the MB. And
  >> btw, both of the cpu's being barton cores are the same inside.
  >>
 > You're wrong. Take a look at AMD's data sheet for the Athlon XP's. They
 > all have an on-die thermal diode. What's done with the signal from the
 > thermal diode is all handled by the motherboard.

No, I'm not wrong. The diode isn't the sensor. It is the device the sensor
takes a reading from to calculate the temp. If they call it a sensor in
the the data sheets, then the data sheets are wrong. I didn't look, nor do
I have to look. I know how the crap works. The actual sensor chip can be
one of many. The one on this baord happens to be an IT8712F IIRC. The
sensor takes it's reading from the onboard diode of the cpu. A lot of
boards use the Winbond chips too.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
My server <a style='text-decoration: underline;' href="http://wesnewell.no-ip.com/cpu.php" target="_blank">http://wesnewell.no-ip.com/cpu.php</a>
Verizon server <a style='text-decoration: underline;' href="http://mysite.verizon.net/res0exft/cpu.htm" target="_blank">http://mysite.verizon.net/res0exft/cpu.htm</a><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Do the mobile Athlon XP's have on-board temp sensors/diodes? 

On Wed, 30 Mar 2005 15:18:41 +0000, Wes Newell wrote:

 > On Wed, 30 Mar 2005 12:25:21 +0000, Homer J. Simpson wrote:
 >
  >> "Wes Newell" <w.newell RemoveThis @TAKEOUTverizon.net> wrote in message
   >>> There are no sensors in the cpu. The sensors are a part of the MB. And
   >>> btw, both of the cpu's being barton cores are the same inside.
   >>>
  >> You're wrong. Take a look at AMD's data sheet for the Athlon XP's. They
  >> all have an on-die thermal diode. What's done with the signal from the
  >> thermal diode is all handled by the motherboard.
 >
 > No, I'm not wrong. The diode isn't the sensor. It is the device the sensor
 > takes a reading from to calculate the temp. If they call it a sensor in
 > the the data sheets, then the data sheets are wrong. I didn't look, nor do
 > I have to look. I know how the crap works. The actual sensor chip can be
 > one of many. The one on this baord happens to be an IT8712F IIRC. The
 > sensor takes it's reading from the onboard diode of the cpu. A lot of
 > boards use the Winbond chips too.

Having thought about this for a minute, I will admit that the diode could
be referenced as a sensor of sorts, but it by no means actually gives any
temps, just voltages that are read by the actual sensor chips that are on
the MB. So, I recant, hoping everyone realizes that it's still just a part
of the sensor circuit and is absolutely worthless without a sensor chip on
the MB. Which I think was what the original poster was wanting to know.
Both cpu's have the same diode as the are the same core.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
My server <a style='text-decoration: underline;' href="http://wesnewell.no-ip.com/cpu.php" target="_blank">http://wesnewell.no-ip.com/cpu.php</a>
Verizon server <a style='text-decoration: underline;' href="http://mysite.verizon.net/res0exft/cpu.htm" target="_blank">http://mysite.verizon.net/res0exft/cpu.htm</a><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Do the mobile Athlon XP's have on-board temp sensors/diodes? 

My brother's NF7 v2.0 is exhibiting the same behavior w/his Mobile Athlon
(i.e. it's displaying two temps that obviously correspond to the CPU, w/one
temp slightly higher [2 degrees celsius] than the other).

--
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"Doug" <pigdos.DeleteThis@nospamcharter.net> wrote in message
news:OaD2e.218$_T6.199@fe06.lga...
 > That's what I figured. With my old Barton I was monitoring the motherboard
 > thermistor since it was the highest temp. Now that I've put in the Mobile
 > Athlon the on-board thermistor is no longer the highest temp because
 > another temperature magically appeared (in Speedfan 4.12) that reads 7
 > degrees farenheit hotter (4 degrees celsius) at idle.
 >
 > Another strange thing that has happened is that the Counterstrike: Source
 > VST doesn't load all the models since I made the switch to the Mobile
 > Athlon, instead I get spinning ERRORs in red.
 >
 > --
 > Remove nospam to email
 > "Doug Collette" <douglas.p.collette.DeleteThis@fmr.com> wrote in message
 > news:ZqF1e.1$O3.22@news-srv1.fmr.com...
  >> Doug wrote:
   >>> I only ask because I just recently replaced my old Barton 2800+ (which
   >>> was running at 2300Mhz @ 2.125V Vcore) with a Mobile Athlon XP 2600+
   >>> (running at 2600Mhz @ 1.875V Vcore) and noticed that speedfan is
   >>> reporting two temps of around 45 degrees celsius. One of the temps
   >>> reported is 45 and the other is 46. My old Barton had only one high
   >>> temperature reading not two. This is all on an Abit NF7S v2.0.
   >>>
  >> Yes, the mobile Athlon has temperature sensing diode on the chip. It's
  >> pretty easy to tell which of the two temperature sensors you're ready by
  >> putting a heavy load on the CPU (Prime 95 works well for this) and
  >> watching both temperatures. The CPU diode will change very quickly while
  >> the motherboard thermistor will change very gradually.
  >>
  >> Doug
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Do the mobile Athlon XP's have on-board temp sensors/diodes?