iMac GPU temp increase after Lion

Discussion in 'iMac' started by Wreckie, Oct 6, 2011.

  1. Wreckie macrumors regular

    Joined:
    May 9, 2011
    #1
    I am experiencing quite big temperature increase of GPU after installing Lion. With SL I had about 60'C while slight usage and web browsing, now iStat shows 75'C. I don't consider it normal, what could cause it? Is there any possible fix for it?

    Thx in advance
     
  2. Spike88 macrumors 6502a

    Joined:
    Jan 25, 2010
    #2
    One method to keep iMac insides cooler is to install 3rd party Fan Control software. Increase the default fan speed by a small 300 RPMs (re: default is is 950 RPMs. Increase to minimum 1200 RPMs) and it will keep the insides cooler.

    If wondering, I run 3rd party fan speed software on my iMac and it runs 5C-8C much cooler - compared to factory default. And, I'm not "over spinning" its internal fan speeds either. re: http://www.macupdate.com/app/mac/23049/smcfancontrol

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    I read a few times that Lion doesn't like Flash. As a suggestion, use Lion with Firfox Web Browsing application instead. If your iMac insides run cooler, then one odds are, it has something to do with Flash (in Safari).

    .
     
  3. Spike88, Oct 6, 2011
    Last edited: Oct 6, 2011

    Spike88 macrumors 6502a

    Joined:
    Jan 25, 2010
    #3
  4. Wreckie thread starter macrumors regular

    Joined:
    May 9, 2011
    #4
    I am concerned aboit electricity usage. More heat at same fan RPM = more energy used for GPU. Before it was normal so it has something to do with software.
     

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