Skip navigation

Mid 2007 iMac Running Hot. ?

4440 Views 17 Replies Latest reply: Aug 6, 2013 6:06 AM by James Peebles RSS
  • BTfromNC Calculating status...
    Currently Being Moderated
    Dec 1, 2012 8:25 PM (in response to GFG)

    I have another post on this, but thought it was worth posting here. I will paste the text from my other thread here:


    Good news.

    I bought a used GPU heatsink off ebay for $5 and bought some Arctic Silver thermal paste from Amazon for $10.

    I replaced the heatsink and used new thermal paste, and after 90 minutes of having my son play Minecraft on it, the fans arent spinning fast and the GPU temps are staying around the 120 (f) mark.

    Before, after about 5-10 mins of the computer sitting idle, the temps would have skyrocketed.


    I hope I am not speaking too soon, but so far, this looks promising. I dont know if the problem was a bad sensor, heatsink or thermal paste, but for a $15 repair, I dont care which was the problem. I might have just gotten another year of life out of this thing.

  • brainstormescu Calculating status...
    Currently Being Moderated
    Mar 25, 2013 7:24 AM (in response to BTfromNC)

    Not so good news:

    It's the operating system (10.8.3 in my case) that causes the spike in GPU temps.

    Other users report that downgrading the operating system solves the problem.

    In Bootcamp with Windows 7 the GPU temperature is around 60º C, while in OS X 10.8.3 everything related to the GPU is at least 20º C hotter. The Graphics Processor's load in 10.8.3 on my iMac is around 15% on average. 


    My configuration:

    Screen Shot 2013-03-25 at 3.22.47 PM.jpg

  • James Peebles Calculating status...
    Currently Being Moderated
    Aug 6, 2013 6:06 AM (in response to BTfromNC)

    I've got the same machine identical and my CPU heatsink is running over 230 degrees.  Is there a break down demo that shows how to replace GPU or heatsink? 

1 2 Previous Next


More Like This

  • Retrieving data ...

Related Articles

Bookmarked By (1)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.