iMac overheating issue?

Discussion in 'iMac' started by kayle12, Jul 8, 2008.

  1. kayle12 macrumors member

    Aug 15, 2004

    I was playing Portal in Bootcamp last night and my iMac just shut off. Unfortunately I had the music I couldn't tell if the fans were working correctly.

    What do you recommend I do? I am worried that something might have got damaged? Should I turn the fans up using SMC Fan Control in OS X before I play games in Bootcamp?

    Any suggestions?

  2. scuzy macrumors member

    Mar 20, 2006
    i think smcfancontol only works when it's running in OSx. If you're in bootcamp you're relying on windows control of the fans.
  3. imac123 macrumors regular

    Apr 26, 2008
    i would try this:

    - boot up in OS X and using smcfancontrol, set your fan speeds to a level where you can clearly hear them spinning (usually about 1/2 way on the "line/dial").
    - then try restarting (don't shutdown fully) and hold the option key and boot into windows
    - listen for the fans and try to determine if they are still at the smcfancontrol high settings or if they spun down to normal (almost inaudible) settings.

    thats probably the quickest way to test things. otherwise you can look for a windows program that monitors fan speeds
  4. matt321 macrumors member

    Oct 27, 2007
    Have you upgraded your graphics card drivers in Windows lately?

    I heard that the catalyst drivers have been improved to help regulate the GPU heat.
  5. aki macrumors 6502a

    Mar 2, 2004
    imac123 is right

    for games in bootcamp run smcfancontrol in osx and set all fans med/med-hi my win gaming settings r maybe 65% or something of max

    then reboot not shutdown just reboot into windows and game

    if u want to check u can game for a few hours and reboot to osx and run istat or whatever right away and get some idea how heat is going and turn up your windows gaming fan setting in smcfancontrol if u need too

    from my experience my cpu and gpu r always ok BUT the hd gets too hot if i game for some time
  6. gehrbox macrumors 65816


    Jul 5, 2007
    Does your iMac have the NVidia 8800 video option? Is it the 3.06GHz model?
  7. iNotion macrumors regular


    Jun 5, 2008
    i was quite worried about the overheating issue, and the long term damage to the set. It is terribly hot on the top. Mine is a 24”iMac 2.8Ghz, 4GB RAM:apple:
  8. gehrbox macrumors 65816


    Jul 5, 2007
    Install iStat Pro ( )

    Monitor your temps/fan speeds. During normal web surfing CPU temps should be around 45-55c. CPU/HDD fan speeds of 1200 and Optical fan around 700 RPM are normal during browsing work loads.
  9. youtube macrumors newbie

    Jul 8, 2008
    Good information to know. I was also looking to get an iMac and had no idea you can control the fan speed. Thx!
  10. aki macrumors 6502a

    Mar 2, 2004
    ...use istat pro ignore the hot top!! :) basically the metal case of yr imac gives out lots of the heat from inside so it is always hot and this is no problem its the temp inside that is what u must think about

    again i dont think its much to think about for normal osx use only maaaaaybe if u do say a lot of video or rendering and want your imac to last many years

    i just think for people who use the bootcamp to game it is important 2 think of
  11. minicoop503 macrumors regular

    Feb 11, 2008
    There is a program for windows called "smartfan" that you can download and monitor and change fan speeds.

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