Intel Core 2 Duo E4500 TjMax Value

GoogleCodeExporter commented 8 years ago

Hey, i tested the library on several machines at my home.

From one station i with an E4500 i got an too high Temperature ( in compare to 
other temp programms, like coretemp).

+-+ Intel Core 2 Duo E4500 (/intelcpu/0)
|   +- Temperature[0] : CPU Core #1
|      +- TjMax [°C] : 95 : 95
|      +- TSlope [°C] : 1 : 1
|   +- Temperature[1] : CPU Core #2
|      +- TjMax [°C] : 95 : 95
|      +- TSlope [°C] : 1 : 1

I saw in the Report that you use 95. 

CoreTemp for example uses 85 as an TjMax.

Just want to inform you about that.

Original issue reported on code.google.com by worldbeh...@gmail.com on 8 Apr 2011 at 8:19

GoogleCodeExporter commented 8 years ago

Which TjMax does Real Temp use for your CPU? 
http://www.techpowerup.com/realtemp/

Can you attach an Open Hardware Monitor report (File -> Save Report...) to get 
the exact revision/stepping of your E4500.

Original comment by moel.mich on 8 Apr 2011 at 8:48

Changed state: NeedsInfo

GoogleCodeExporter commented 8 years ago

i will attach the report :)

due to your really good structured source code i could check the value 
personally.

this are the necessary report lines

+-+ Intel Core 2 Duo E4500 (/intelcpu/0)
|   +- Temperature[0] : CPU Core #1
|      +- TjMax [°C] : 95 : 95
|      +- TSlope [°C] : 1 : 1
|   +- Temperature[1] : CPU Core #2
|      +- TjMax [°C] : 95 : 95
|      +- TSlope [°C] : 1 : 1

Processor Vendor: Intel
Processor Brand: Intel(R) Core(TM)2 Duo CPU     E4500  @ 2.20GHz
Family: 0x6
Model: 0xF
Stepping: 0xD

In your IntelCPU.cs you set the tjMax due to the Stepping 0xD to 95

case 0x0D: // M0
                    tjMax = Floats(85 + 10); break;

is the + 10 for a reason there??

As for the RealTemp Tjmax. Its interesting. TjMax is there 90 :D 

So now we have three values:

90 from RealTemp
95 from Open Hardware Monitor
85 from CoreTemp

Original comment by worldbeh...@gmail.com on 8 Apr 2011 at 9:12

GoogleCodeExporter commented 8 years ago

just for the summary, i found an everest log on the internet of someone using 
E4500 too

There is the values also 85 for tjMax

CPUID Properties:
      CPUID Manufacturer                                GenuineIntel
      CPUID CPU Name                                    Intel(R) Core(TM)2 Duo CPU E4500 @ 2.20GHz
      CPUID Revision                                    000006FDh
      IA Brand ID                                       00h  (Unknown)
      Platform ID                                       2Bh / MC 01h  (LGA775)
      Microcode Update Revision                         A3
      HTT / CMP Units                                   0 / 2
      Tjmax Temperature                                 85 °C  (185 °F)

Original comment by worldbeh...@gmail.com on 8 Apr 2011 at 9:41

GoogleCodeExporter commented 8 years ago

85°C is the value Intel published as TjTarget in some slides. But many of the 
65nm CPU temperature values have been too low with a TjMax = TjTarget, and 
Intel justified this with saying these values are only target values, the true 
value might be higher. At some point we agreed to use TjTarget + 10°C as 
TjMax. 

What are your idle and load temperatures with the current TjMax of 95°C? What 
cooling, core voltage and clock are you using? What temperatures do you have on 
your HDDs? Just to get an idea if the temperature shown are really too high.

Original comment by moel.mich on 8 Apr 2011 at 10:42

GoogleCodeExporter commented 8 years ago

for terms of idle and load i will come to you back. So far the above 
temperatures are in idle

for your other questions 

+-+ ASUS P5LD2-VM (4.00G) (/mainboard)
|   |
|   +-+ Winbond W83627EHF (/lpc/w83627ehf)
|   |   +- Voltage[0] : 1.144 : 1.128 : 1.144 : CPU VCore
|   |   +- Voltage[1] : 1.856 : 1.856 : 1.856 : Voltage #2
|   |   +- Voltage[2] : 3.344 : 3.328 : 3.344 : AVCC
|   |   +- Voltage[3] : 3.344 : 3.312 : 3.344 : 3VCC
|   |   +- Voltage[4] : 1.688 : 1.68 : 1.696 : Voltage #5
|   |   +- Voltage[5] : 1.608 : 1.608 : 1.608 : Voltage #6
|   |   +- Voltage[6] : 1.616 : 1.608 : 1.624 : Voltage #7
|   |   +- Voltage[7] : 3.312 : 3.312 : 3.344 : 3VSB
|   |   +- Voltage[9] : 1.6 : 1.6 : 1.616 : Voltage #10
|   |   +- Temperature[0] : 34 : 34 : 36 : CPU
|   |   +- Temperature[1] : 42.5 : 42.5 : 43 : Auxiliary
|   |   +- Temperature[2] : 42 : 42 : 42 : System
|   |   +- Fan[1] : 1721.939 : 1721.939 : 1739.691 : CPU Fan
|
+-+ Intel Core 2 Duo E4500 (/intelcpu/0)
|   +- Clock[0] : 200.0289 : 200.0289 : 200.0289 : Bus Speed
|   +- Clock[1] : 1200.173 : 1200.173 : 1200.173 : CPU Core #1
|   +- Clock[2] : 1200.173 : 1200.173 : 1200.173 : CPU Core #2
|   +- Temperature[0] : 35 : 35 : 42 : CPU Core #1
|   +- Temperature[1] : 35 : 35 : 40 : CPU Core #2
|   +- Load[0] : 1.623572 : 0.06204148 : 50.03102 : CPU Total
|   +- Load[1] : 1.623572 : 0.06204148 : 100 : CPU Core #1
|   +- Load[2] : 1.623572 : 0.06204148 : 7.303923 : CPU Core #2
|
+-+ ST3160813AS (/hdd/0)
|   +- Temperature[0] : 34 : 34 : 34 : HDD

Original comment by worldbeh...@gmail.com on 8 Apr 2011 at 12:08

GoogleCodeExporter commented 8 years ago

[deleted comment]

GoogleCodeExporter commented 8 years ago

*bump*

FYI, the Intel-released TjMax values for the e6xxx and E4xxx lines are 70c (for 
revs B2, B3, & L2) and 80c (for revs G0 & M0):

http://www.tomshardware.co.uk/intel-dts-specs,news-29460.html

Original comment by sandwic...@gmail.com on 13 Jun 2012 at 2:05

GoogleCodeExporter commented 8 years ago

There is newer "corrected" Intel data from 18. Nov 2008 which is used as basis 
in the Open Hardware Monitor code. But for some values I have added an offset 
of +10°C to accommodate the fact the values are only target values.

Do you have any measured values or calibration data that would support changing 
the default values coded into the Open Hardware Monitor?

I might also change the value if Core Temp, RealTemp and CPUID HWMonitor agree 
on another value or range.

Original comment by moel.mich on 13 Jun 2012 at 3:27

ccj2012 / open-hardware-monitor

Intel Core 2 Duo E4500 TjMax Value #192