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Please Help! Temperature accurate?

post #1 of 6
Thread Starter 
E4500 stock (2.2Ghz) M0
I'm doing an Intel Thermal Analysis 100% load on both cores

Asus probe (AI Suite): CPU temp 67C

Intel Thermal Analysis:
Core 0: 48
Core 1: 52

Core Temp 0.99
Core 0: 52
Core 1: 52

Who do I trust?
post #2 of 6
trust coretemp, is that load?
post #3 of 6
Thread Starter 
Quote:
Originally Posted by Skullzaflare View Post
trust coretemp, is that load?
It's 100% load, here are the idle readings:

Asus probe (AI Suite): CPU temp 49C

Intel Thermal Analysis:
Core 0: 36
Core 1: 35

Core Temp 0.99
Core 0: 33
Core 1: 32


As you can see the ASUS program that came with my mobo is giving me crazy high temps.
post #4 of 6
Quote:
Originally Posted by OJX View Post
It's 100% load, here are the idle readings:

Asus probe (AI Suite): CPU temp 49C

Intel Thermal Analysis:
Core 0: 36
Core 1: 35

Core Temp 0.99
Core 0: 33
Core 1: 32


As you can see the ASUS program that came with my mobo is giving me crazy high temps.
Well it depends, what are the Tj max values read from each program?

All e4500s are M0 stepping, and therefore(if I recall correctly) have a Tj max value of 100°C.

So if the ones reading lower have a Tj max value of 85°C you actually have to add +15°C to their displayed temps.
Calculon Ω
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Calculon Ω
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post #5 of 6
Thread Starter 
Quote:
Originally Posted by MasterKromm View Post
Well it depends, what are the Tj max values read from each program?

All e4500s are M0 stepping, and therefore(if I recall correctly) have a Tj max value of 100°C.

So if the ones reading lower have a Tj max value of 85°C you actually have to add +15°C to their displayed temps.
Aww crap thanks,
so my 32C is actually 47
Now why does arctic freezer suck...
post #6 of 6
Quote:
Originally Posted by OJX View Post
Aww crap thanks,
so my 32C is actually 47
Now why does arctic freezer suck...
I'm not all that concerned with my temps so I haven't really gone crazy reading through all the documentation, but there's some good info here.
Quote:
Introduction

RealTemp is compatible with any version of Windows 2000, XP or Vista, 32 or 64 bit. In Vista, or if you are in a limited account, you will need to right click on the icon and run RealTemp as an Administrator so that the necessary driver can be properly installed.

RealTemp is a temperature monitoring program designed for all Intel single Core, Dual Core and Quad Core processors. Each core on these processors has a digital thermal sensor (DTS) that reports temperature data relative to TjMax which is the safe maximum operating core temperature for the CPU.

If the value of TjMax is known and if the data being output by the DTS sensors changed at the exact same rate that the core temperature was changing at then you could use this simple formula to convert DTS data to your absolute core temperature: Absolute Temperature = TjMax - DTS

The Problem


There are two major problems though with that formula. Problem #1 is that the value of TjMax is not documented by Intel for their desktop processors. They list 100ºC for their 65nm mobile processors and 105ºC for their new 45nm mobile processors but there are no publicly available manuals from Intel that contain this information for desktop processors. Because of this, most programs can only guess at a value for TjMax.

Intel has written a program that many users and programmers depend on for TjMax information. It's commonly called TAT which stands for Thermal Analysis Tool. Unfortunately this is a tool that was designed for testing laptop processors and was never originally designed for or been updated by Intel to cover the desktop processors. The temperature information displayed by this tool when used with a desktop processor might be meaningless.

The second problem is that the data being output by the DTS sensors is not linear which Intel has confirmed here.

Each problem is significant by itself but when these two problems are combined, the amount of error in a reported temperature can approach 20ºC at idle. For me, that's unacceptable.That's also the reason why I decided to write Real Temp.
There is speculation, or was anyway, it has been a while since I looked into it... But if I recall correctly not all e4x00s used solder between the cores and IHS, some actually had thermal grease. Which resulted in high temps, however it also opened the possibility to remove the IHS. Still I'd at least reapply TIM/reseat the HS before undertaking such a procedure as there is some risk involved.

http://www.overclock.net/intel-cpus/...-should-i.html
Calculon Ω
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CPUMotherboardGraphicsRAM
Q6700 @ 3.7Ghz 1.37V DFI LT X48-T2R vNB 1.24 EVGA 460GTX 4x2GB Patriot 1000mhz CL5 
Hard DriveOSMonitorPower
2x x-25m Vista x64 24" BenQ G2400WD Corsair VX550W 
Case
CM Cosmos 1000 
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Calculon Ω
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6700 @ 3.7Ghz 1.37V DFI LT X48-T2R vNB 1.24 EVGA 460GTX 4x2GB Patriot 1000mhz CL5 
Hard DriveOSMonitorPower
2x x-25m Vista x64 24" BenQ G2400WD Corsair VX550W 
Case
CM Cosmos 1000 
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