Sleep mode temperature

Discussion in 'MacBook Pro' started by cool11, May 3, 2015.

  1. cool11 macrumors 65816

    cool11

    Joined:
    Sep 3, 2006
    #1
    I had several mbp during the past, and now.
    My last one is from late '13.

    All of them, as far as I can remember, when I put them to 'sleep' mode, they keep being a little bit warm. Slightly warm, nothing special.
    I thought this is normal, and possibly is.
    But a friend of mine, with huge experience in pc's (but not in apple), told me that this should not happen. He told me that even though the electricity is present in my mbp, it should be cold.
    If it is not cold, then maybe something(process?) 'keeps' my mac 'active'(besides sleep mode) and maybe this is the reason for not being cold.

    What is the truth? What should I expect about temperature, when I put it on sleep mode?
     
  2. JTToft macrumors 68040

    Joined:
    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #2
    For how long after you've put it to sleep have you monitored the temperature?
    Naturally, it will take a while for the heat the dissipate. Given enough time, it should become quite cold externally.

    That said, there is a feature called Power Nap, which allows the MBP to perform various tasks while sleeping, which might generate a bit of heat:
     
  3. cool11 thread starter macrumors 65816

    cool11

    Joined:
    Sep 3, 2006
    #3
    I did not know about 'power nap'.
    Can I check something about it?

    The comparison is this one:
    temperature of a 'shut down' mbp -- vs -- temperature of 'sleep mode' mbp.

    It does not has , as far as I have seen, any relation with time.
    Either after one hour from 'sleep', or five hours from 'sleep', temperature is never so cold like a completely closed machine.
     
  4. JTToft macrumors 68040

    Joined:
    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #4
    - Well, you can disable it and see if the situation changes. If it does, then that's the reason for it being warm.
     
  5. snaky69 macrumors 603

    Joined:
    Mar 14, 2008
    #5
    In sleep mode the computer should reach room temperature if given enough time to cool. Unless something woke it up.
     
  6. cool11 thread starter macrumors 65816

    cool11

    Joined:
    Sep 3, 2006
    #6
    I did it, thanks for the tip.
    However, mbp was still a little bit warm.
    Warmer than the status of being totally shut down.
    I can't tell if it was slightly colder compared to previous state when 'power nap' was enabled.

    I don't think there is anything to 'wake up'. In this case, I could see the apple logo in mbp screen case lighted, right?

    So, any guess about what is going on?
    As I said, same happened with previous mbp also.

    I would like to hear other mbp experience about this matter.
     
  7. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #7
    Is it charging while asleep, the battery will be warm while charging, the efect of being warm before sleep then being put onto charge can keep it warm for several hours after it is put to sleep.

    If it isn't charging then any significant heat will be draining the battery, if the battery is losing charge while asleep at an unusual rate then that indicates something is going on.
     
  8. T5BRICK macrumors 604

    T5BRICK

    Joined:
    Aug 3, 2006
    Location:
    Oregon
    #8
    Instead of going by feel, you ought to measure the actual temperature of the laptop after it's been off for an hour compared to when it's been sleeping for an hour.
     
  9. cool11 thread starter macrumors 65816

    cool11

    Joined:
    Sep 3, 2006
    #9
    I have it always connected, everything I say concerns mbp attached to the power cord, always. So, battery indicates 100% always.

    ----------

    I 'll take a look.
     

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