8 Replies Latest reply: Sep 5, 2013 5:45 AM by The hatter
piranut Level 1 Level 1 (0 points)

Hi, I've just installed window 8 pro on my bootcamp partition (clean install) and noticed that while running in idle (I saw that cpu usage is less than 5%), the cpu temparature is very high(80c ++) and the fan speed is at maximum (6500 rpm).The powerplan that I used is Balance. My mac is macbook air 13" 2012 with 8GB of RAM and 128 GB SSD. Previously I had no problem when running with window 7 pro. Does anybody know how to fix it? The temperature while running in OS X 10.8.2 is normal (about 45-50 c in idle and fan speed at 2000 rpm). Thank you in advance for all of your answers.


MacBook Air, Other OS, Window 8
  • 1. Re: CPU temp is very high while running in window 8
    Csound1 Level 8 Level 8 (35,470 points)

    Windows 8 is not supported, there are no drivers. Live with it or remove Windows 8.

  • 2. Re: CPU temp is very high while running in window 8
    JPSSnyder Level 1 Level 1 (5 points)

    It seems possible that drivers could affect the temperature. "Live with it" is not helpful if you don't know what the possible consequences are. Intel processors have thermal protection so they will usually throttle off before heat damage. But at 5% usage it sounds like the SSD may be the problem? The thermal protection is not as good for SSD memory components. Even though it seems unlikely (SSD's mimic SATA drives) there may be a battle going on in the SSD managers. I would carefully monitor temperature when you are in the OS X side and compare it to the Win 8 readings (are you sure the temp/fan reading are accurate?). If the Win 8 side stays hot you probably should wait a few weeks until there are more bleeding edge reports on Win 8 / Bootcamp (I ran Win 8 Preview on bootcamp on a MacPro with only a few problems).

  • 3. Re: CPU temp is very high while running in window 8
    Csound1 Level 8 Level 8 (35,470 points)

    JPSSnyder wrote:

     

    It seems possible that drivers could affect the temperature. "Live with it" is not helpful if you don't know what the possible consequences are

    Then what is your solution for the non-existent drivers?

     

    Magic maybe?

  • 4. Re: CPU temp is very high while running in window 8
    BobTheFisherman Level 6 Level 6 (10,970 points)

    JPSSnyder wrote:

     

    It seems possible that drivers could affect the temperature. "Live with it" is not helpful if you don't know what the possible consequences are. Intel processors have thermal protection so they will usually throttle off before heat damage. But at 5% usage it sounds like the SSD may be the problem? The thermal protection is not as good for SSD memory components. Even though it seems unlikely (SSD's mimic SATA drives) there may be a battle going on in the SSD managers. I would carefully monitor temperature when you are in the OS X side and compare it to the Win 8 readings (are you sure the temp/fan reading are accurate?). If the Win 8 side stays hot you probably should wait a few weeks until there are more bleeding edge reports on Win 8 / Bootcamp (I ran Win 8 Preview on bootcamp on a MacPro with only a few problems).

    Win 8 Preview was not the same as the current Windows 8. Windows 8 is not supported, Read the first item here. http://support.apple.com/kb/HT1899.

     

    So it does not matter what you do. There are no Windows 8 drivers. You can tinker, hack, modify, etc. but the fact remains that there are no drivers. So if a driver is required for grahics, power control, fan control, keyboard, wifi, etc, etc, you are out of luck. There are many posts here of hacks and work arounds but some of these work and some do not. It seems like a lot of chance and work to take to get to a system that may work or not.

  • 5. Re: CPU temp is very high while running in window 8
    LexSchellings Level 5 Level 5 (5,690 points)

    Read the posts here: no drivers for Windows8 in Bootcamp.

    Use Parallels or VMware or Virtualbox to run a W8 Virtual Machine: they have the drivers in them.

  • 6. Re: CPU temp is very high while running in window 8
    JPSSnyder Level 1 Level 1 (5 points)

    It is either Magic that several users report that Win 8 works in BootCamp with only minor irritations, or it is the fact that the Win 8 drivers are very similar to the Win 7 drivers. You can believe in the magic explanation if you want to, I favor the tech answer. The bottomline is that for at least some users Win 8 is running in BootCamp without hacks. I agree that there is a risk running Win 8 before Apple supports it, and I would be hesitant to try it on an SSD equipped Mac, but if you are willing to try it it may work fine just as it has for others, This is a bit dated but it discusses the pros and cons - http://arstechnica.com/information-technology/2012/11/no-support-no-problem-inst alling-windows-8-on-a-mac-with-boot-camp/

  • 7. Re: CPU temp is very high while running in window 8
    ol1v3r.uk73 Level 1 Level 1 (0 points)

    Csound1 wrote:

     

    JPSSnyder wrote:

     

    It seems possible that drivers could affect the temperature. "Live with it" is not helpful if you don't know what the possible consequences are

    Then what is your solution for the non-existent drivers?

     

    Magic maybe?

     

     

    One solution:

    "Read the psts here: no drivers for Windows8 in Bootcamp.

    Use Parallels or VMware or Virtualbox to run a W8 Virtual Machine: they have the drivers in them."

     

    Two solutions:

    http://arstechnica.com/information-technology/2012/11/no-support-no-problem-inst alling-windows-8-on-a-mac-with-boot-camp/

     

    And no magic!
    People like you on Mac forums are so ridiculous. Someone is asking for help but because it goes against your Mac leanings you have to be unhelpful and agressive when you really have nothing useful or intelligent to add...

  • 8. Re: CPU temp is very high while running in window 8
    The hatter Level 9 Level 9 (58,885 points)

    10.8.3 download the Boot Camp 5.x drivers and install those.

     

    Macs tend to run hotter in Windows. That has always been true though some systems do better and with more recent drivers from Apple.

     

    I have dozen 'tips' on various issues in the past for Windows 8 and MacBook Air and others. Now some of those were addressed with new drivers and even new firmware.

     

    MacBook Air and MacBook Pro Update 1.0 (76.64 MB)

    This update fixes an issue that can lead to increased CPU power consumption, and it improves compatibility with some USB devices.

    Products Affected:

     

    MacBook Air (11-inch/13-inch, Mid 2012), MacBook Pro (13-inch, 15-inch, Mid 2012), MacBook Pro (Retina, Mid 2012)

    Additional Information:

     

    This update is recommended for all Mac notebooks introduced since June, 2012."

     

    *******

     

    To get your fans to work on your Macbook Pro.

     

    Shut down you computer. After it is shut down press Command+Option+Control+Shift and then press the power button. Nothing should happen - your screen should remain blank.

     

    The computer should Not start to boot up at this point. After you have done this. Release the 4 buttons and press the power button once again.

     

    Use the Option Key to get back into your bootcamp Partition of Windows 7.

     

    The fans should now properly spin up when your computer starts to get hot.

     

    Startup Key combination: here is the old list:

    http://support.apple.com/kb/HT1343

    Startup Key combinations new list

     

    I personally searched for hours for this same solution then finally resorted to calling apple. It was a very simple thing to do for something so important as cooling. The key combination resets your hardware settings in your bios for the fans. My fans now correctly function.

     

    *****

     

    MacBook Air 2012

    Core i7 upgrade

     

    You get a choice of three different CPUs. The Core i5-3317U comes standard in the 11, the i5-3427U comes with the 13, and both systems can be upgraded to the Core i7-3667U.

     

    There is a known bug with the upgraded CPU under Windows. Turbo Boost is disabled under Windows on the 3667U, although it's fully functional under OS X. Apple is aware of the problem and I'd expect a fix at some point, but there's no indication of when.

     

    http://www.anandtech.com/show/6063/macbook-air-13inch-mid-2012-review/2

     

    *****

     

    Sometimes all the Boot Camp drivers were not getting installed properly and had to go back and individually run some of the drivers.

    This may or may not be possible as it seems to be Apple has changed the installer package... so take with grain of salt.

     

    Also an issue with administrative accounts.

     

    Installing Windows 8 On a MacBook Air

    http://www.pcmag.com/article2/0,2817,2393005,00.asp

     

    Trouble just downloading drivers. Burning ISO. Using external USB-DVD or flash installer drive.

     

    *  a bug with Boot Camp control panel and administrative rights.

     

    when trying to launch the "Boot Camp Control Panel", but I just stumpled upon a solution.

     

    I created a new Windows user, that was not Administrator. When I logged in Boot Camp updateded something and asked me to restart the computer.

    After restarting and logging in with my new user, I could start the "Boot Camp Control Panel" configure tap to click and use F1-F12 as function keys.

     

    Then I changed the new account to Administrator and now the control panel can not be startet again... but my settings remained... only on the new user only though.