iMac very hot running Win 7 under Bootcamp

Discussion in 'iMac' started by BasilFawlty, Mar 6, 2012.

  1. BasilFawlty, Mar 6, 2012
    Last edited: Mar 6, 2012

    BasilFawlty macrumors 6502


    Jun 20, 2009
    New Mexico
    I have Win 7 installed using Boot Camp. It works great, but I have noticed my iMac seems to be much hotter to the touch when I've been running Windows. Is the fan not working, or do I need to do something to ensure the fan is working correctly in Windows?
  2. halfp1nt, Mar 22, 2012
    Last edited: Mar 22, 2012

    halfp1nt macrumors newbie

    Mar 22, 2012
    What video card do you have?
    I have a MBP that I bootcamped and installed Win7 on. Under normal use, the fans would spin up and I would notice that it would run rather hot. First I tested to see if Aero in Win7 was contributing to this behavior but turning Aero off had no effect. I have a AMD HD 6490M. Trying to install the drivers from AMDs website failed - The Install would prompt that I had incompatible hardware/software.
    Just last night, I noticed that on AMDs website they have a MAC Graphics drivers specifically for Bootcamp, so I installed those, and so far it seems to have solved my issue.
  3. JWSandi macrumors regular

    Jul 19, 2008
    Trashville, TN.
    I have the same issues, the upper part of my iMac gets much warmer than it does when running OSX, not hot but very warm.

    Ive yet to have any issues like shutting down etc... I keep a desk fan blowing on the computer case just to give it some cool air.

    But I'm concerned, especially when I run MS flight simulator for two or three hours at a time.

    You say this is normal, can you please explain why, I'd just like to know more about why it runs hotter than normal.
  4. theSeb macrumors 604


    Aug 10, 2010
    Poole, England
    Touching the back of your iMac is not a valid way of trying to ascertain how hot it is running. Get applications for both osx and windows and compare internal temperatures and fan speeds.
  5. smoledman macrumors 68000

    Oct 17, 2011
    I can confirm. I just installed Windows 7 Ultimate on my 2010 iMac. It runs very hot at the top but cooler at the bottom.
  6. aure28 macrumors newbie

    Dec 12, 2012
    Same here, it's normal.
  7. obsoletepower macrumors regular

    Dec 14, 2006
    Toronto, Canada
    Remember, the case will act like a heatsink since it is made of aluminium. The temperature of the case will reflect that of the CPU / GPU. Do not worry too much about it. As others have said, it is normal.

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