P4P800 Motherboard Temp
in [Asus]
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From: Gert B. Frob on 11 Jul 2005 18:10 Where is the "mother board" temperature sensor located? Mine is reading hotter than it has in the past and I'd like to investigate bringing it down some. If it's around the Northbridge, how is the Northbridge heat sink attached (other than the obvious spring loaded hold downs)? Does it incorporate a thermal pad or compound? I'm thinking it might have loosened, if so. Since upgrading four harddrives and putting in quieter fans, the indicated temp has risen from about 32 c to 40 c. While I don't think this is too hot, I wouldn't mind getting it back down, hopefully without going back to nosier fans. Suggestions?
From: Husky on 12 Jul 2005 08:30 On Mon, 11 Jul 2005 15:10:37 -0700, "Gert B. Frob" <sbrentcarter(a)spaminator.net> wrote: >Where is the "mother board" temperature sensor located? Mine is reading >hotter than it has in the past and I'd like to investigate bringing it down >some. > >If it's around the Northbridge, how is the Northbridge heat sink attached >(other than the obvious spring loaded hold downs)? Does it incorporate a >thermal pad or compound? I'm thinking it might have loosened, if so. > >Since upgrading four harddrives and putting in quieter fans, the indicated >temp has risen from about 32 c to 40 c. While I don't think this is too >hot, I wouldn't mind getting it back down, hopefully without going back to >nosier fans. > >Suggestions? > Kick off the sides, allow air flow all thru the thing. If you ain't in an office, can you really afford to keep the room at 52 degrees 24/7 ? Mine runs so cool the fans almost stop. That's the biggest alert I get where the fans drop below norm. And having the heat sensor moved away >I'm thinking it might have loosened, if so. from the heat source would DROP the temp not raise it. -- more pix @ http://members.toast.net/cbminfo/index.html
From: Gert B. Frob on 12 Jul 2005 08:53 "Husky" <cbminfo(a)toast.net> wrote in message news:apc7d1d8o7klqkf1cb5feqb3nfta0n6h6p(a)4ax.com... > On Mon, 11 Jul 2005 15:10:37 -0700, "Gert B. Frob" > <sbrentcarter(a)spaminator.net> wrote: > > >Where is the "mother board" temperature sensor located? Mine is reading > >hotter than it has in the past and I'd like to investigate bringing it down > >some. > > > >If it's around the Northbridge, how is the Northbridge heat sink attached > >(other than the obvious spring loaded hold downs)? Does it incorporate a > >thermal pad or compound? I'm thinking it might have loosened, if so. > > > >Since upgrading four harddrives and putting in quieter fans, the indicated > >temp has risen from about 32 c to 40 c. While I don't think this is too > >hot, I wouldn't mind getting it back down, hopefully without going back to > >nosier fans. > > > >Suggestions? > > > > Kick off the sides, allow air flow all thru the thing. If you ain't in an > office, can you really afford to keep the room at 52 degrees 24/7 ? > Mine runs so cool the fans almost stop. That's the biggest alert I get where > the fans drop below norm. > > And having the heat sensor moved away > >I'm thinking it might have loosened, if so. > from the heat source would DROP the temp not raise it. > > -- > more pix @ http://members.toast.net/cbminfo/index.html If there is a thermal pad or compound beneath the Northbridge heat sink and it loosened, the temperature of the Northbridge would rise, not fall. And, if the "motherboard" temperature probe was located by the Northbridge, it would indicate same. While removing the sides of the case would, no doubt, lower the indicated temperature, it's not the solution I had in mind. Thanks for your thoughts.
From: Husky on 12 Jul 2005 10:55 On Tue, 12 Jul 2005 05:53:57 -0700, "Gert B. Frob" <sbrentcarter(a)spaminator.net> wrote: > >"Husky" <cbminfo(a)toast.net> wrote in message >news:apc7d1d8o7klqkf1cb5feqb3nfta0n6h6p(a)4ax.com... >> On Mon, 11 Jul 2005 15:10:37 -0700, "Gert B. Frob" >> <sbrentcarter(a)spaminator.net> wrote: >> >> >Where is the "mother board" temperature sensor located? Mine is reading >> >hotter than it has in the past and I'd like to investigate bringing it >down >> >some. >> > >> >If it's around the Northbridge, how is the Northbridge heat sink attached >> >(other than the obvious spring loaded hold downs)? Does it incorporate a >> >thermal pad or compound? I'm thinking it might have loosened, if so. >> > >> >Since upgrading four harddrives and putting in quieter fans, the >indicated >> >temp has risen from about 32 c to 40 c. While I don't think this is too >> >hot, I wouldn't mind getting it back down, hopefully without going back >to >> >nosier fans. >> > >> >Suggestions? >> > >> >> Kick off the sides, allow air flow all thru the thing. If you ain't in an >> office, can you really afford to keep the room at 52 degrees 24/7 ? >> Mine runs so cool the fans almost stop. That's the biggest alert I get >where >> the fans drop below norm. >> >> And having the heat sensor moved away >> >I'm thinking it might have loosened, if so. >> from the heat source would DROP the temp not raise it. >> >> -- >> more pix @ http://members.toast.net/cbminfo/index.html > >If there is a thermal pad or compound beneath the Northbridge heat sink and >it loosened, the temperature of the Northbridge would rise, not fall. And, >if the "motherboard" temperature probe was located by the Northbridge, it >would indicate same. > >While removing the sides of the case would, no doubt, lower the indicated >temperature, it's not the solution I had in mind. > >Thanks for your thoughts. > What I was saying is if the SENSOR moved away from the heat source, the temp would drop, not rise. Much cooler 10 feet from the flame than sitting in it. I jumped in because we have the same setup. Mine burned up a 350 watt power supply in less than a day. actually hours after setup. And that was with the sides off. -- more pix @ http://members.toast.net/cbminfo/index.html
From: Paul on 12 Jul 2005 11:59
In article <89KdnRlBUtTGc0_fRVn-og(a)comcast.com>, "Gert B. Frob" <sbrentcarter(a)spaminator.net> wrote: > Where is the "mother board" temperature sensor located? Mine is reading > hotter than it has in the past and I'd like to investigate bringing it down > some. > > If it's around the Northbridge, how is the Northbridge heat sink attached > (other than the obvious spring loaded hold downs)? Does it incorporate a > thermal pad or compound? I'm thinking it might have loosened, if so. > > Since upgrading four harddrives and putting in quieter fans, the indicated > temp has risen from about 32 c to 40 c. While I don't think this is too > hot, I wouldn't mind getting it back down, hopefully without going back to > nosier fans. > > Suggestions? My guess would be it is located next to the Winbond hardware monitor chip. Since some brands of thermistors come in exactly the same packaging as ordinary resistors, it isn't always possible to tell them visually. I would hope the silk screen on the boards would use something informative like "RT1" for a thermistor, instead of "R1" which sould be appropriate for a simple resistor. My guess would be, the new hard drives are very near the hardware monitor chip, and the extra heat they throw off, plus the reduction in airflow around the Winbond chip area, is causing the sensor to read a higher temp. I've tried looking at my P4C800-E, but I'd need the services of a good microscope to figure this one out. My eyes simply are not good enough to trace this, without pulling the motherboard from its case. For details on your Winbond W83627THF chip (I assume that is the chip), look for that part number on this page: http://www.winbond-usa.com/products/winbond_products/view.phtml?name=PCIC Pins 102, 103, 104 on page 18, are where the thermal input signals go. On page 33, you can see how Rth is connected to pin 104, to allow monitoring system temperature. So, somewhere near that pin, expect to find the thermistor, and the 10K ohm resistor used to form a voltage divider. Asus should keep these parts close to the monitor chip, as if they are mounted far from the chip, noise will get added to the signal. So, best guess, the sensor is in the upper right hand corner of the motherboard. Paul |