bios temp / real temp

Page 1 of 2 12 LastLast

  1. Posts : 627
    win 7 ( 64 bit)
       #1

    bios temp / real temp


    hello
    can someone please tell me why my bios temp is 31C. and after booting to windows 7 real temp says 42c.?
    i'm using a E8400 chip and asus motherboard (p5q pro turbo) . what should the tjmax in real temp be set to i have it at 95 now .
    thanks for your help
    scrooge
      My Computer


  2. Posts : 53,363
    Windows 10 Home x64
       #2

    I believe it is because BIOS doesn't measure the core temps like Real Temp does. It measures the CPU temp. I think CPU temp will always be lower than the core temps? Also, differences in programs will do that. Intel said that Tjmax was 100, but they also said these sensors are incredibly inaccurate and get worse the further you go from Tjmax.

    The RealTemp documentation outlines how you can calibrate your sensors to get more accurate idle temps.

    A Guy
      My Computer


  3. Posts : 3,028
    Windows 7 Ultimate (x64) SP1
       #3

    My core temps are always around 10c lower than my CPU surface temp.

    What are you're Cpu and System Temps ?
      My Computer


  4. Posts : 5,056
    Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
       #4

    This is a somewhat hazy area but may be a intel/amd thing. On intel processors, core temps are reported higher than cpu temps while on amd's (at least certain amd's) its the reverse. Starting with the Phenoms, AMD's sensor no longer reports an absolute temperature anymore, but a reading with a certain offset, which is unknown. It is estimated that this offset is between 10 - 15c.

    Also different motherboards have sensors placed somewhat differently.
      My Computer


  5. Posts : 3,028
    Windows 7 Ultimate (x64) SP1
       #5

    Bill2 said:
    This is a somewhat hazy area but may be a intel/amd thing. On intel processors, core temps are reported higher than cpu temps while on amd's (at least certain amd's) its the reverse. Starting with the Phenoms, AMD's sensor no longer reports an absolute temperature anymore, but a reading with a certain offset, which is unknown. It is estimated that this offset is between 10 - 15c.

    Also different motherboards have sensors placed somewhat differently.
    That's right. For AMD CPUs, the CPU temp is taken directly from the mobo sensor. The Core temps are calculated readings based on who knows what (???)
      My Computer


  6. Posts : 1,965
    win 7 X64 Ultimate SP1
       #6

    High -- Low


    Interesting subject. Only familiar with Intel. Core temps run about 8 -- 10 deg higher than CPU temp. I am trying to imagine why "core" temps would run lower. If the word core can be related to inside then they would run warmer as the skin is losing heat at a faster rate. I am going to have find something to read on that. I had never gave it much thought.
      My Computer


  7. Posts : 1,965
    win 7 X64 Ultimate SP1
       #7

    CPU Temp


    After some reading on the I7 900 series. It seems to me there is only one DTS on board the chip. A single wire (Trace) and a dedicated pin for output. The signal is analog converted to digital. I guess all the core readings, etc. are "voodoo" determined by some math calc.

    AMD could be reporting the distance to Tmax which would give a lower reading than skin?
    Last edited by HammerHead; 30 Oct 2010 at 06:57. Reason: AMD
      My Computer


  8. Posts : 654
    Windows 7 Ultimate x64
       #8

    could the reason for the difference in temperature simply be that the computer is not under any load in bios, but after booting the OS, and the background process's running, there is a now a load?
      My Computer


  9. Posts : 2,259
    W7 Professional x64
       #9

    Bill2 said:
    This is a somewhat hazy area but may be a intel/amd thing. On intel processors, core temps are reported higher than cpu temps while on amd's (at least certain amd's) its the reverse. Starting with the Phenoms, AMD's sensor no longer reports an absolute temperature anymore, but a reading with a certain offset, which is unknown. It is estimated that this offset is between 10 - 15c.

    Also different motherboards have sensors placed somewhat differently.
    Could it just be a "Phenom"enon? (I'm sorry, I could not resist)

    The AMD temperature reading could read lower, as the motherboard might absorb heat, while the cores are in direct contact with the case, which offers cooling?
      My Computer


  10. Posts : 11,424
    Windows 7 Ultimate 64
       #10

    From my latest Intelligence it is a Phenomenon !
      My Computer


 
Page 1 of 2 12 LastLast

  Related Discussions
Our Sites
Site Links
About Us
Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 14:03.
Find Us