MBP running hot (not a WoW question this time)

Discussion in 'MacBook Pro' started by Kristenn, Mar 14, 2010.

  1. Kristenn macrumors 6502

    Aug 30, 2009
    Yeah I quit playing WoW. Anyway, to the point. I'm running my 15 inch MBP (late 08 model)

    2.53 Ghz Core 2 Duo
    4 GB DDR3 RAM
    Nvidia Geforce 9400M (600M, whatever)
    Nvidia Geforce 9600M GT (512 MB)
    250 GB 7200 rpm HDD

    On the dedicated graphics. Its plugged in. I noticed it running hot when using flash in Safari (big surprise, right?) and thought it was because of flash. So after I was done (wasn't using flash anymore) I started safari later and was viewing text documents online and my fans... I can actually hear them and the top left part above my keyboard is hot.

    Also I checked the activity monitor and there is a thing called Kernel_Task (probably supposed to be there, its intel and it sounds like it should be there... lol) using 256 MB of RAM and 1.4 % of processor and like 75 threads.

    Anyway, Pic below of iStat Pro.


    Running hot. Anyway, even when I was just using Safari to browse the website (nothing running in the background besides Mail) it keeps getting hot and I can hear the fans at almost always 3000 rpms.

    I don't recall it running hot for simple stuff like this before even on the dedicated card. Just wondering should I worry about it? What do you think is up?

    Thanks! ^^
  2. Pax macrumors 6502a

    Dec 12, 2003
    CPU is working quite hard for kind of load you are putting on it (Safari+Mail).
    The total CPU load is 41%. That would probably explain your temps and fans.
    What could be using all the CPU?
    Was there a lot of Flash on the sites you were viewing? (Flash is a CPU hog)
    Were there any other tasks running?
    - in Activity Monitor, you can select "all processes" rather than just "my processes" so you can see what the system is doing as well
    - in Activity Monitor, you can sort by CPU load and check out the largest

    SOMETHING is using 33% of your CPUs - I bet it's Safari+Flash

    If so ways to fix it include
    - download ClickToFlash which blocks Flash
    - download Flash 10.1 beta which uses about 1/2 the CPU of Flash 9

    best of luck
  3. Patriks7 macrumors 65816


    Oct 26, 2008
    Wow really? :confused: I have the 2.4 MacBook Pro (late 08 as well) and I have it set up to constantly run at 4000rpm. Maybe your fan is going too low? Anyway, maybe showing a screenshot of your processes would help a bit.
  4. Kristenn thread starter macrumors 6502

    Aug 30, 2009
    Hmm. Well thanks for the replies! I did update flash. And I restarted the computer today. I'm not on the dedicated card though but it seems to be running cooler again. =/
  5. jdevanus macrumors newbie

    Apr 10, 2010
    Fan running all the time

    I'm new to this site and I just wanted to ask a question, hope, I'm not intruding posting it here.

    Suddenly my macbook fan started running constantly, when I looked into my activity monitor I found a driver to my lexmark printer was using 100% CPU. I have had this printer and used this printer for months and I cannot figure out why this suddenly happened. I quit the application and now my computer is cooled down, no fan running. Since I am going to college I use my printer quite often, does anyone know what I can do to solve this problem?
    Thanks so much!!

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