iMac heating using bootcamp

Discussion in 'iMac' started by Gintoki-kun, Sep 7, 2012.

  1. Gintoki-kun macrumors member

    Sep 7, 2012
    I have an iMac, late 2011
    27" 4gb ram, 1tb hdd, 1gb graphics 3,1ghz i5 (not sure about the last one).
    Normally, using os x, it doesn't heat, even when using high end applications.
    But when I use windows 7 via bootcamp it heats seriously. And I just use it to play Titan quest. Not a very high end game. Is that normal?
    I'm thinking of using my iMac to play gw2. Won't it heat?
  2. jav6454 macrumors P6


    Nov 14, 2007
    1 Geostationary Tower Plaza
  3. Gintoki-kun thread starter macrumors member

    Sep 7, 2012
    No. But, by touching the iMac when using os x, and touching when using windows, I can assure you that it's way hotter using windows.
  4. GGJstudios macrumors Westmere


    May 16, 2008
    It's normal for Macs to get hot to the touch when running. The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)

    If you're not already using it, iStat Pro (free) or iStat Menus ($16) will give you accurate readings of your temps and fan speeds, among other things.

    Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.

    It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.

    Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. They will spin faster as needed to keep temps at a safe level.

    If your fans are spinning up without increased heat, try resetting the SMC.
    (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)

    The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best.

    Learn about the fans in your Mac
    Apple Portables: Operating temperature

    For Flash-related issues:
  5. Gintoki-kun thread starter macrumors member

    Sep 7, 2012
    Thanks. I'll see the temps when I got home, it's Sunday. They should be around which temps using windows, to call it "normal"?
    I don't overdo my iMac when using windows like I explained earlier :)
  6. jji7skyline macrumors 6502


    Aug 10, 2011
    I have the same problem. Even normal usage makes my iMac pretty hot. Never got it hot enough to shut down automatically though, but then again, I'm not a gamer.

    It's likely a difference in the fan drivers, or a lack thereof :)

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