Malfunctioning temp. sensor

Today I turned on my computer as usual, and my fan (Cooler Master) started spinning 2-3x faster than usual (judging by noise). After, with PC Wizard 2008 I saw that my MB temp is 128deg C. And no, not F, C. So as I think this is the maximum temp. possible, it must be a sensor mistake.

Now, I know I can ignore it cause its nothing, but I think it makes my fan work faster (but not in turbo mode I think) and it makes a lot of noise, which bothers me....

Is there a way to reduce fan speed, or by fixing sensor or by manual reduction?

My config:
Win. XP Pro SP3,
Intel Pentium Dual-Core E5200 @ 2.50 GHz,
2GB DDR2 RAM
MB: MSI G31TM-P35 (MS-7529)
ATI Radeon HD 4350
3 answers Last reply
More about malfunctioning temp sensor
  1. Welcome to Tom's Forum! :)

    Use HW Monitor -> http://www.cpuid.com/softwares/hwmonitor.html
    or CoreTemp 0.99.x -> http://www.alcpu.com/CoreTemp/

    Yes, -128C or whatever is a 'NULL' or absent thermal probe. Using HWMonitor or CoreTemp, because I know they work, if the CPU Temperature is some oddball number then your MOBO has an issue {a/k/a bad}.

    I 'tried' top look in your manual to see what CPU Fan controls you have but none are listed. I do know 'Load Optimized' by default will/should control your CPU fan speed by Temp, and there 'may' be a setting to control the speed in a 'static' and less than full speed.

    Alternatively, since your system is old LGA 775 it might be a good idea to replace the CMOS battery and/or use the Clear CMOS procedure per page 20 -> http://www.msi.com/service/download/manual-10558.html this 'may' correct the problem.
  2. Lol, i hoped this will be a common procedure, get in bios and zap..... Anyway, i didn't understand 1/2 things you wrote due to my lack of knowledge, but i got HW Monitor log if you can make something out of it....


    CPUID HWMonitor Report
    -------------------------------------------------------------------------

    Binaries
    -------------------------------------------------------------------------

    HWMonitor version 1.1.7.0

    Monitoring
    -------------------------------------------------------------------------

    Mainboard Model G31TM-P35 (MS-7529) (0x00000446 - 0x8D217B49)

    LPCIO
    -------------------------------------------------------------------------

    LPCIO Vendor Fintek
    LPCIO Model F71882F
    LPCIO Vendor ID 0x1934
    LPCIO Chip ID 0x541
    Config Mode I/O address 0x4E
    Config Mode LDN 0x4
    Config Mode registers

    Register space LPC, base address = 0x0A00


    Hardware Monitors
    -------------------------------------------------------------------------

    Hardware monitor Fintek F71882F
    Voltage 0 3.31 Volts [0xCF] (+3.3V)
    Voltage 1 1.13 Volts [0x8D] (CPU VCORE)
    Voltage 2 0.06 Volts [0x4] (VIN2)
    Voltage 3 0.02 Volts [0x2] (VIN3)
    Voltage 4 5.13 Volts [0x7A] (+5V)
    Voltage 5 11.79 Volts [0x86] (+12V)
    Voltage 6 1.74 Volts [0x6D] (VIN6)
    Voltage 7 3.30 Volts [0xCE] (VSB3V)
    Voltage 8 3.18 Volts [0xC7] (VBAT)
    Temperature 0 28°C (82°F) [0x1C] (TMPIN0)
    Temperature 2 31°C (87°F) [0x1F] (TMPIN2)
    Fan 0 4000 RPM [0x177] (FANIN0)
    Fan PWM 0 100 pc [0xFF] (CPU)
    Fan PWM 1 50 pc [0x80] (System Fan 1)
    Fan PWM 2 60 pc [0x99] (System Fan 2)
    Fan PWM 3 60 pc [0x99] (System Fan 3)
    Register space LPC, base address = 0x0A00


    Hardware monitor ATI I/O
    Temperature 0 61°C (141°F) [0x3D] (TMPIN0)

    Hardware monitor AMD ADL
    Voltage 0 1.10 Volts [0x44C] (VIN0)
    Temperature 0 61°C (140°F) [0x3C] (TMPIN0)


    Processors
    -------------------------------------------------------------------------

    Number of processors 1
    Number of threads 2

    APICs
    -------------------------------------------------------------------------

    Processor 0
    -- Core 0
    -- Thread 0 0
    -- Core 1
    -- Thread 0 1

    Processors Information
    -------------------------------------------------------------------------

    Processor 1 ID = 0
    Number of cores 2 (max 2)
    Number of threads 2 (max 2)
    Name Intel Pentium E5200
    Codename Wolfdale
    Specification Pentium(R) Dual-Core CPU E5200 @ 2.50GHz
    Package (platform ID) Socket 775 LGA (0x0)
    CPUID 6.7.6
    Extended CPUID 6.17
    Core Stepping M0
    Technology 45 nm
    Core Speed 2500.1 MHz
    Multiplier x FSB 12.5 x 200.0 MHz
    Rated Bus speed 800.0 MHz
    Stock frequency 2500 MHz
    Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, EM64T
    L1 Data cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
    L1 Instruction cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
    L2 cache 2048 KBytes, 8-way set associative, 64-byte line size
    FID/VID Control yes
    FID range 6.0x - 12.5x
    Max VID 1.175 V

    TDP Limit 65 Watts


    Thread dumps
    -------------------------------------------------------------------------

    CPU Thread 0
    APIC ID 0
    Topology Processor ID 0, Core ID 0, Thread ID 0
    Type 01008006h
    Max CPUID level 0000000Ah
    Max CPUID ext. level 80000008h
    Cache descriptor Level 1, D, 32 KB, 1 thread(s)
    Cache descriptor Level 1, I, 32 KB, 1 thread(s)
    Cache descriptor Level 2, U, 2 MB, 2 thread(s)


    CPU Thread 1
    APIC ID 1
    Topology Processor ID 0, Core ID 1, Thread ID 0
    Type 01008006h
    Max CPUID level 0000000Ah
    Max CPUID ext. level 80000008h
    Cache descriptor Level 1, D, 32 KB, 1 thread(s)
    Cache descriptor Level 1, I, 32 KB, 1 thread(s)
    Cache descriptor Level 2, U, 2 MB, 2 thread(s)


    Graphic APIs
    -------------------------------------------------------------------------

    API ATI I/O
    API ADL SDK

    Display Adapters
    -------------------------------------------------------------------------

    Display adapter 0
    Name Radeon HD 4350
    Codename RV710
    Technology 55 nm
    GPU ref clock 27000
    PCI device bus 1 (0x1), device 0 (0x0), function 0 (0x0)
    Vendor ID 0x1002 (0x1462)
    Model ID 0x954F (0x1619)

    I reduced it a bit.... Can u think of where any fan settings might be? Thx :(
  3. Guessing - it looks like American BIOS.

    Boot and hit the 'Delete' key to access the BIOS
    Once in use the arrow keys '->' to Power
    Use the arrow down to CPU Q-Fan and hit Enter key, select Enabled
    Use the arrow down to Fan Ratio and hit Enter key, select Auto

    Optional there might be CPU Target Temp, you can select the lowest value but the lowest value may spin the fan on high to keep that temp.

    Use the arrow to the right to Save & Exit, save settings = Yes.

    Good Luck! :)

    BTW - HWMonitor seems to detect the CPU core temps...
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