Goddamn, this computer is running HOT!!!

March 30th, 2009

Apple / Mac, MS / Windows

tempmonitorHave you ever heard your fans kick up to their highest RPM, so you feel the bottom of your computer to see why and shout “Goddam, this computer is running HOT!!!” I definitely have before and its not good for you or your system. Not only have people actually been severely burned by overheated laptops, but any computer guru knows that heat and computer componentsĀ do notĀ get along. Thankfully, Dell decided to spend an extra couple of dollars and add some heat sensors to the computer so you can monitor the temperature of your Hard Drive and all your computer cores (2 if you have a Dual Core or Core 2 Duo processor).

To monitor the temperature in OS X, download temperature monitor. When you launch it for the first time, a window will pop up telling you that it needs to install special drivers for Intel processors or something to that extreme. Hit ok and then restart the program. When it relaunches it should tell you the correct temperature of your computer’s processor and and Hard Drive. A normal/safe temperature is around 40 – 55 degrees Celsius although even going up to 60 isn’t gonna fry your computer. Once it starts hitting 65 and above is when you close the lid, turn the computer upside down, and walk away for a couple minutes so it can cool off.

For Windows, i8kfangui is a great program that will read even more sensors and also allow you to control the speed of the fans.

While these program read the temperature of your computer, certain kexts within OS X will not allow the BIOS to properly control the fans, thus making the fans start when the computer is much hotter than the BIOS wants it to be. First step, Backup. Backup, backup, backup!!! And once more, backup. I cant stress this idea enough. So once you have backed up your data, go ahead and remove AppleIntelCPUPowerManagement.kext and any other kext that comes up in a quick search in spotlight for “thermal” (there should anywhere from 0-2 of them). Then restart your computer and your computer should run a little cooler.

If you found this guide useful then feel free to make a donation by clicking the link at the end of the Author’s Mini-Biography. Any amount truly does help.

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About Thomas

Thomas is a self-proclaimed guru (just ask him). He enjoys long walks on the beach, running Mac OS X on his Inspiron 1525, and tweeting about nonsensical life happenings. You can follow Thomas on twitter, email him, or search the interwebs for all his personal information. Neither should be too difficult.

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15 Responses to “Goddamn, this computer is running HOT!!!”

  1. Kaya

    I’m still running 10.5.5, so I still can’t get the preference pane working, but I’m planning on updating 10.5.6, I’ve just been backing up all my files and setting for the past few days. Also, my machine runs at around 45C while idling in Vista and Ubuntu. So, it’s not dust in my fan. By the way, I should be thank YOU for running such a wonderful site. You have no idea how happy I was when I found it last year while trying to get my hackbook up and running.

  2. Kaya

    I deleted AppleIntelCPUPowerManagement.kext and Applethermal.kext, but still my computer is running at around 70C while idling. Is there anything else I can do to lower it some more. By the way, my fan is always running, but it’s very low.

    • Thomas

      Before I saw anything, I’d just like to thank you for being one of the only people to actually use the guides and be a little independent! You can’t even imagine how many of my responses are merely links as the question has already been answered in one of my many guides. Getting back to your issue, it’s possible that the fan is clogged with dust, thus raising the temperatures and causing it to always rise. There are Inspiron 1525 take apart guides here. And is this under Leopard or Snow Leopard? Also, were you ever able to resolve your other issue?

  3. Nathan

    Usually I hate this it sets my leg on fire
    But in winter its really good sometimes keeps me warm lol.

  4. Richard

    Very nice :) That’ll save you some leg hair and probably also add additional life to your laptop by running cooler. Electronics, plastic, and heat don’t mix.

  5. John Demented

    Wow I am actually shocked. No sooner than installing the voodoo power management and following this guide my temputure has droped below 50 idling around 48/49 for my CPU. Feel great when my leg doesnt feel like its on fire.

  6. Thomas

    Oooh, i didnt know you could do that lol. Thanks so much for the tip. I think I’m going to do that too. Thanks!

  7. Hawered

    I set temperature Monitor to start at login and notify me when the temperature goes over 65 degrees.

  8. Thomas

    Call me crazy but I would sacrifice battery life for performance. And, because Richard brought it up, OS X gives you better performance with better battery life. Also, less time loading means more time being productive.

  9. Richard

    That sounds snazzy, but if I wanted programs to load slow I’d install Vista! Sorry, Bill. I’m not a PC.

  10. Genaro Bonilla

    From what I understand intelenhancedspeedstep and voodoo are very similar in their stepping but Voodoo is customizable therefore you can make it so that rather than stepping too high your processor will just take longer to open a program. This can be beneficial if you like to have total control.

  11. Thomas

    I am also using the intel enhanced speedstep kext and it works great. Even as I have Mail, Adium, transmission, itunes(paused though), and MSR tools open, I go no higher than 1.06 GHz (61.5%) of my total processor as opposed to 100% without the speedstep kexts. I’m sure the voodoo stuff works great too but as Richard said, If it ain’t broke, dont fix it!

  12. Richard

    I’ve been doing good with the enhanced speedstep kexts, clocking my 1.87GHz Pentium Dual Core to a cool 800MHZ when I’m idle or around 1GHz when surfing the web. It keeps the heat down and saves on battery life when I’m on the go. I’ve heard good things about the voodoo power kext too but hey, if it ain’t broke don’t fix it.

  13. Cristian

    Thanks for your post. What I have actually seen is that keeping this program running will eat up your battery. Installing voodoo power kext will keep the computer cooler and save your battery life as well. I am on iPC 10.5.6, never found in spotlight ‘thermal’ to return some kexts.