Check for Overheating CPU or Video Card

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An overheating system can lead to graphical instability and frame rate loss. For an optimal gaming experience, reduce overheating issues with your system by following the steps below.

Windows

You can monitor your heat levels during play by downloading the free version of HWMonitor from CPUID. Once you've installed the program, follow these steps:

  1. Start up HWMonitor.
  2. Run HWMonitor while you play the game.
  3. After you experience instability or a severe loss in frame rate, exit the game.
  4. Review the max temperatures reached in HWMonitor.
  5. If your CPU goes over 60 degrees Celsius or your GPU (video card) hits 80 degrees Celsius or above, you likely have an overheating issue.

Overheating may be caused by a buildup of dust and dirt inside the computer case or the malfunctioning or failure of a cooling fan inside the computer. Use a can of compressed air to clean the dust from your computer fans and vents. Note these helpful tips:

  1. If you are using a laptop, play on a solid surface. Soft surfaces reduce airflow and will cause the system to run at a higher temperature. A desk or table is an ideal gaming surface.
  2. Running unnecessary applications and processes can cause additional strain on the computer, which may increase your system's running temperature. Closing Background Applications can greatly increase game performance and stability.
  3. Lowering in-game video settings can help boost performance and reduce heat.
  4. Make sure you are playing in a cool environment. Playing in a room or area that is 80°F (27°C) or greater can contribute to overheating and degrade your performance.

Mac

  1. Play on a solid surface. Setting your Mac® on cloth, magazines, your lap, or other soft surfaces will reduce airflow and cause it to run at a higher temperature. Run your Mac in a location with good ventilation and on a surface that will dissipate heat. A desk or table is an ideal gaming surface.
  2. Running unnecessary applications and processes can cause additional strain on the computer, which may increase your Mac's running temperature. Closing Background Applications can greatly increase game performance and stability.
  3. Lowering in-game video settings can help boost performance and reduce heat.
  4. Dust can reduce airflow over the various components inside the machine. Try vacuuming with a static-protected vacuum designed for sensitive electronic components or using compressed air, which can be purchased at many office and electronics supplies stores. If you are not comfortable removing dust from your Mac, take it to a local Apple Authorized Service Provider (AASP) to have a professional clean it for you. 
  5. Make sure you are playing in a cool environment. Playing in a room or area that is 80°F (27°C) or greater can contribute to overheating and degrade your performance. Keep a fan pointed directly at your Mac to circulate cool air around the machine or consider buying a laptop cooling pad.
  6. If you notice your Mac is getting too hot and you have followed the instructions above, it may be because Spotlight is indexing. This usually takes several hours, and is performed so that your drive can be better searched. Click the Spotlight icon to see how much longer the indexing will take. Avoid performing intensive tasks on your Mac while Spotlight is indexing, as performance will suffer and the computer will be more prone to overheating.

Tried everything here?

If you have tried all of the steps for your operating system and still require assistance, please visit our Technical Support Forum (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) or contact us.

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