AMD Diode~ accurate?...

MadDogMe · 09-04-2002, 04:18 AM

Can anyone tell me if the on~die thermal diode is accurate?. or does it all boil down to the chip reading it?

.
I've noticed abit of banter about CPU temps here and am thinking why nobody uses the on~chip diode?. I know of only one mobo that supports it(and I can't remember the name!) , but the mod to make one is'nt that hard is it?.
Perhaps someone would start knocking them out? Hmm?...

mfpmax · 09-04-2002, 02:47 PM

What motherboard do you have? Cause a few don't support the on-die diode.

MadDogMe · 09-08-2002, 04:21 AM

Like I said, I only ever heard of one, (an Asus with 'COP' I think) that does.
non of the techies here know if it's acurate or not?. no techie modded up a reader?. I'm shocked!!

:shrug: ...

I have a Abit KX7~R

.

bigben2k · 09-08-2002, 03:02 PM

Actually, we covered this in Webmasta33 block roundup thread, but it was inconclusive.

pHaestus · 09-08-2002, 04:07 PM

There is some guy around here who has done a fair amount of playing around with internal diodes and AMD chips...the name escapes me at the moment though

The linearity is pretty good; the omemade diode readers sometimes are not. I put down my comments here:

http://www.procooling.com/articles/h...rmal_dio.shtml

Epox has a motherboard (8K3A) that reportedly reads temps right from the diode. Asus's COP is NOT the same as reporting the diode temps. The Asus boards with COP traditionally added an IC that would poll the diode and shut down the system if temps were over a preset value (75C I think). Perhaps they switched from using this to a completely different IC on their newest mobos; perhaps not. My gut instinct is that people simply went from saying "Asus temp monitoring reports high temps because it sucks" (they historically used a surface mount thermsistor with a 10-11C offset to account for the fact they were extrapolating the CPU core temp from the air temp of the socket) to "Asus temp monitoring reports high temps because it reads from the diode" (but this has not in my eyes been substantiated). I at one point in the days of yore mentioned this about the Asus dually:

http://www.voidyourwarranty.net/revi...cop/index.php3

Anyone with an Asus that "reads temps from diode"? Take out (use tweezers) the surface mount thermistor in the socket and see.

09-04-2002, 04:18 AM	#1
MadDogMe Thermophile Join Date: Aug 2002 Location: Just shut up ;) ... Posts: 1,068	AMD Diode~ accurate?... Can anyone tell me if the on~die thermal diode is accurate?. or does it all boil down to the chip reading it? . I've noticed abit of banter about CPU temps here and am thinking why nobody uses the on~chip diode?. I know of only one mobo that supports it(and I can't remember the name!) , but the mod to make one is'nt that hard is it?. Perhaps someone would start knocking them out? Hmm?...

09-04-2002, 02:47 PM	#2
mfpmax Cooling Savant Join Date: Oct 2000 Location: Rockledge,FL,US Posts: 731	What motherboard do you have? Cause a few don't support the on-die diode. __________________ My old and retired watercooling setup. Watercooled K6-2 450 at 600 Also Retired - Watercooling an XP1800@1782MHz

09-08-2002, 03:02 PM	#4
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Actually, we covered this in Webmasta33 block roundup thread, but it was inconclusive. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

09-08-2002, 04:21 AM	#3
MadDogMe Thermophile Join Date: Aug 2002 Location: Just shut up ;) ... Posts: 1,068	Like I said, I only ever heard of one, (an Asus with 'COP' I think) that does. non of the techies here know if it's acurate or not?. no techie modded up a reader?. I'm shocked!! :shrug: ... I have a Abit KX7~R .

09-08-2002, 04:07 PM	#5
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	There is some guy around here who has done a fair amount of playing around with internal diodes and AMD chips...the name escapes me at the moment though The linearity is pretty good; the omemade diode readers sometimes are not. I put down my comments here: http://www.procooling.com/articles/h...rmal_dio.shtml Epox has a motherboard (8K3A) that reportedly reads temps right from the diode. Asus's COP is NOT the same as reporting the diode temps. The Asus boards with COP traditionally added an IC that would poll the diode and shut down the system if temps were over a preset value (75C I think). Perhaps they switched from using this to a completely different IC on their newest mobos; perhaps not. My gut instinct is that people simply went from saying "Asus temp monitoring reports high temps because it sucks" (they historically used a surface mount thermsistor with a 10-11C offset to account for the fact they were extrapolating the CPU core temp from the air temp of the socket) to "Asus temp monitoring reports high temps because it reads from the diode" (but this has not in my eyes been substantiated). I at one point in the days of yore mentioned this about the Asus dually: http://www.voidyourwarranty.net/revi...cop/index.php3 Anyone with an Asus that "reads temps from diode"? Take out (use tweezers) the surface mount thermistor in the socket and see.

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