TJ Max value wrong?:
One "Young and Naive" (No, Not Queen Amidala
) participant of a Bulgarian forum
posted info that let me believe the TJ Max value wrongly determined for his CPU:
Intel Core 2 Duo T5800 (Merom) 2.00GHz [M0]
Intel(R) Core(TM)2 Duo CPU T5800 @ 2.00GHz
Technology 65nm x64 Family 6 Model 15 (0F) Stepping 13 Revision A3
Picture shows that
Real Temp thinks that TJ Max = 100°C (66+34=100)
Intel site shows:
http://ark.intel.com/Product.aspx?id=35581
TJUNCTION 85°C
The (17 years old) owner posted info:
Core Temp shows: Tj.Max = 85°C (and Temperature 51°C)
SIV (System Information Viewer) (shows the same Core Temperature as Core Temp)
http://www.rh-software.com/
SIV32X - System Information Viewer V4.20 ADMIN-PC::Admin
Windows 7 x32 Ultimate (Single User) V6.01 Build 7601 Service Pack 1 ASUS M51Vr ADMIN-PC::Admin English (0409) United States (1)
Workgroup WORKGROUP 00 15:41:34 2011-05-27 08:33:13 [798MHz Single DDR2 RAM] PCI-Express x16 (x16) FSB
RAM 1:2 MCH 0°C
Resource Usage 50% [1] Current Maximum DDR2 RAM CAS Latency 6
System Physical Memory 1.01GB 301.65MB 2.00GB RAS to CAS Delay (tRCD) 6
System Paging File 1.51GB 2.49GB 4.00GB RAS Precharge (tRP) 6
System File Cache 729.88MB 1.28GB 890.26MB Cycle Time (tRAS) 18
Row Cycle Time (tRC) 24
Cores 2 Chips 1 HDDs |Y| 31°C |U| DIMMs |Y| 2GB
Sensor ACPI Thermal Zone |Y| ACPI 48°C
|G| Processor FSB 61% CPU Utilisation Volts Temp Power APIC Socket P BGA-479 Intel Core 2 Duo T5800 (Merom) 2.00GHz [M0]
CPU-0 1.60GHz x8 200MHz U 49% K 12% I 1% 1.00
50°C 25.00 0.0.0 Technology 65nm x64 Family 6 Model 15 (0F) Stepping 13 Revision A3
CPU-1 1.60GHz x8 200MHz U 54% K 8% 1.00
50°C 25.00 0.1.0 CPUs 2 Cores 2 Intel(R) Core(TM)2 Duo CPU T5800 @ 2.00GHz
Memory GPU 1.0% GPU Utilisation L1 Code Cache 8-way 64-byte 32KB
GPU-0 400MHz P0 110MHz Activity 1% 0.95 L1 Data Cache 8-way 64-byte 32KB [3/3]
L2 Unified Cache (2) 8-way 64-byte 2MB [14]
[Cache-0 Latency] [MMX SSSE3 XD]
(this CPU is in ASUS laptop)
P.S.
According to:
http://www.alcpu.com/CoreTemp/howitworks.html
"Intel defines a certain Tjunction temperature for the processor. This value is usually in the range between 85°C and 105°C.
In the later generation of processors, starting with Nehalem, the exact
Tjunction Max value is available for software to read
in an MSR (short for Model Specific Register).
A different MSR contains the temperature data. The data is represented as a Delta in °C between current temperature and Tjunction."
Do you (Real Temp) read (if possible)
Tjunction Max value from an MSR ?
(The author of
TThrottle:
http://www.efmer.eu/boinc/download.html
implemented this recently so I know it is possible:
"3.50 April 2011
New: Read the TJunction (Max) temperature directly from the CPU when possible.
4.10 May 2011
Fixed: (Intel) A read to the CPU to determine the TJunction (Max) temperature, caused the driver to crash on older cpu's.
Now only Family 0x6, Model: 0x1A, 0x1E, 0x1F, 0x25, 0x2C, 0x2E, 0x2A, 0x2D perform a read.
If you know any others that are missing, please let me know.
"
The (long) discussion with me:
http://setiathome.berkeley.edu/forum_thread.php?id=63650&nowrap=true#1094579
And: "A new version of TThrottle now reads the TJunction from the CPU":
http://setiathome.berkeley.edu/forum_thread.php?id=63650&nowrap=true#1095346
)