3 Replies Latest reply on Feb 22, 2018 7:02 AM by N.Scott.Pearson

    temperature difference between two i9's

    dmikh

      Hi,

       

      I have two identical PCs each with i9-7920X CPU and TUF X299 MARK 2 motherboard. Although BIOS settings are default CPU cores on the second PC show a bit higher temperature than on the first PC. The difference around 5 degree C. The output of i7z utility is below.

       

      First PC:

       

      Cpu speed from cpuinfo 3024.00Mhz
      cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc
      Linux's inbuilt cpu_khz code emulated now
      True Frequency (without accounting Turbo) 3025 MHz
        CPU Multiplier 29x || Bus clock frequency (BCLK) 104.31 MHz
      
      Socket [0] - [physical cores=12, logical cores=12, max online cores ever=12]
        TURBO ENABLED on 12 Cores, Hyper Threading OFF
        Max Frequency without considering Turbo 3129.31 MHz (104.31 x [30])
        Max TURBO Multiplier (if Enabled) with 1/2/3/4/5/6 Cores is  44x/44x/44x/44x/44x/44x
        Real Current Frequency 4581.92 MHz [104.31 x 43.93] (Max of below)
              Core [core-id]  :Actual Freq (Mult.)      C0%   Halt(C1)%  C3 %   C6 %  Temp      VCore
              Core 1 [0]:       4477.79 (42.93x)       100       0       0       0    52      1.2317
              Core 2 [1]:       4477.79 (42.93x)       100       0       0       0    52      1.2188
              Core 3 [2]:       4477.79 (42.93x)       100       0       0       0    54      1.2617
              Core 4 [3]:       4373.65 (41.93x)       100       0       0       0    54      1.1666
              Core 5 [4]:       4465.49 (42.81x)      99.8       0       0       0    58      1.2408
              Core 6 [5]:       4376.97 (41.96x)      99.8       0       0       0    55      1.1875
              Core 7 [6]:       4477.79 (42.93x)       100       0       0       0    54      1.2539
              Core 8 [7]:       4477.66 (42.93x)       100       0       0       0    58      1.2330
              Core 9 [8]:       4477.79 (42.93x)       100       0       0       0    61      1.2617
              Core 10 [9]:      4477.79 (42.93x)       100       0       0       0    55      1.2122
              Core 11 [10]:     4477.79 (42.93x)       100       0       0       0    52      1.2043
              Core 12 [11]:     4581.92 (43.93x)       100       0       0       0    55      1.2188
      

       

      On second PC:

       

      Cpu speed from cpuinfo 3024.00Mhz
      cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc
      Linux's inbuilt cpu_khz code emulated now
      True Frequency (without accounting Turbo) 3025 MHz
        CPU Multiplier 29x || Bus clock frequency (BCLK) 104.31 MHz
      
      Socket [0] - [physical cores=12, logical cores=12, max online cores ever=12]
        TURBO ENABLED on 12 Cores, Hyper Threading OFF
        Max Frequency without considering Turbo 3129.31 MHz (104.31 x [30])
        Max TURBO Multiplier (if Enabled) with 1/2/3/4/5/6 Cores is  44x/44x/44x/44x/44x/44x
        Real Current Frequency 4583.35 MHz [104.31 x 43.94] (Max of below)
              Core [core-id]  :Actual Freq (Mult.)      C0%   Halt(C1)%  C3 %   C6 %  Temp      VCore
              Core 1 [0]:       4583.35 (43.94x)       100       0       0       0    59      1.2422
              Core 2 [1]:       4479.19 (42.94x)       100       0       0       0    61      1.2551
              Core 3 [2]:       4479.19 (42.94x)       100       0       0       0    61      1.2551
              Core 4 [3]:       4479.18 (42.94x)       100       0       0       0    57      1.2317
              Core 5 [4]:       4479.19 (42.94x)       100       0       0       0    61      1.2629
              Core 6 [5]:       4583.35 (43.94x)       100       0       0       0    61      1.2578
              Core 7 [6]:       4479.19 (42.94x)       100       0       0       0    60      1.2473
              Core 8 [7]:       4479.19 (42.94x)       100       0       0       0    58      1.2617
              Core 9 [8]:       4479.19 (42.94x)       100       0       0       0    63      1.2617
              Core 10 [9]:      4479.19 (42.94x)       100       0       0       0    61      1.2408
              Core 11 [10]:     4479.19 (42.94x)       100       0       0       0    63      1.2617
              Core 12 [11]:     4479.19 (42.94x)       100       0       0       0    61      1.2551
      

       

      In the first case average temperature is 55C and 60.5C for the second. What could cause the difference? Is it BIOS/motherboard issue or that temperature variation is normal?

       

      thanks,

      Dmitry