What is your CPU Idle temp?

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  1. Posts : 869
    Windows 10 Professional x64 21H2
    Thread Starter
       #21

    I've see that video. As for the core count you are very right. I have 4 cores with 8 Threads. This is turning out to be a very educational post. AMD advertises the FX9590 as 8 cores and 8 Threads.
    Attached Thumbnails Attached Thumbnails What is your CPU Idle temp?-cores.png   What is your CPU Idle temp?-amd.png  
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  2. Posts : 23,288
    Win 10 Home ♦♦♦19045.4355 (x64) [22H2]
       #22

    Lance1 said:
    I've see that video. As for the core count you are very right. I have 4 cores with 8 Threads. This is turning out to be a very educational post. AMD advertises the FX9590 as 8 cores and 8 Threads.


    Back in late 2013, I had contacted AMD about the temps on the FX chips. Went back and forth for a few days, jumped through a few hoops, and eventually they sent me this email explaining how the temps on the FX CPUs worked.

    I can't seem to find that email anymore, but I'll take a stab at it, from memory.

    In a program like AIDA64 Extreme, you use the CPU temp for everyday temp monitoring.

    But for overclocking, you use the Core temp. And the graph the core temp makes as the temp rises, is NOT linear.
    It looks something like this...

    What is your CPU Idle temp?-000-amd-core-temp-curve.png



    When you start to load the CPU, the core temp rises very fast. Faster than the CPU temp.
    They meet at about the 45C spot, then the core temp and the CPU temp... pretty much rise in a similar and drastically slowing fashion.
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  3. Posts : 2,068
    Windows 10 Pro
       #23

    Lance1 said:
    If it is impossible to have these temps then why do I get the same reading from multiple app's? Note the diode reading from AIDA64. Is my sensor malfunctioning?
    Bingo.
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  4. Posts : 23,288
    Win 10 Home ♦♦♦19045.4355 (x64) [22H2]
       #24

    pparks1 said:
    Bingo.


    Actually, it's not because of a bad sensor. According to AMD engineers, they were designed to read this way.
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  5. Posts : 16,645
    Windows 11 Pro X64
       #25

    Lance1 said:
    Then what are you doing wrong? I leave it up to you.
    Nothing, my temps are normal
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  6. Posts : 23,288
    Win 10 Home ♦♦♦19045.4355 (x64) [22H2]
       #26

    Dude said:
    Nothing, my temps are normal


    Can vouch. This is my 3700X right next to a 12,000 BTU window A/C unit...right now...
    Outside = 74F
    Inside = 64F

    27C = 80.6F

    What is your CPU Idle temp?-aida.png



    What is your CPU Idle temp?-image2.png
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  7. Posts : 2,191
    Windows 10 Pro 64-bit v22H2
       #27

    For AMD FX CPUs
    CPU = temperature read from sensor beneath CPU socket
    CPU Diode = temperature read internally in CPU

    There is only only one internal CPU temperature sensor so it is impossible to know the individual core temperatures.
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  8. Posts : 2,068
    Windows 10 Pro
       #28

    Ghot said:
    Actually, it's not because of a bad sensor. According to AMD engineers, they were designed to read this way.
    Fair enough. A misleading sensor at best. But a little bit of reasoning would prove that 2C is not accurate as that would be nearly ice cold.
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  9. Posts : 23,288
    Win 10 Home ♦♦♦19045.4355 (x64) [22H2]
       #29

    pparks1 said:
    Fair enough. A misleading sensor at best. But a little bit of reasoning would prove that 2C is not accurate as that would be nearly ice cold.


    Well yeah. AMD must have had a seriously weak bottom line for that series of chips.
    Every companies marketing depts. get a tad inventive, but AMD (back then) went seriously overboard.
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  10. Posts : 869
    Windows 10 Professional x64 21H2
    Thread Starter
       #30

    I ran AIDA64 and ran the OSD to take some readings. All I did was move my mouse curser around. The CPU Diode adjusted accordingly. So if the sensor is bust then why would it respond to just a mouse movement? Explain this please. Run the video.

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