Diablo III Performance Issues

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If you are experiencing low frame rates, slow or choppy performance, or long loading times, follow the steps for your operating system below.

Windows®

  1. Make sure you meet the Diablo® III System Requirements.
  2. Update your video drivers. Even new computers can have out-of-date drivers, make sure to update your video drivers regularly. 
  3. Our games require an up-to-date operating system in order to run properly. Run Windows Update to be sure you're using the most recent version.
  4. Your settings may be too high. Lower the maximum framerate.
  5. Make sure the Battle.net App states Game is up to date for Diablo III.
  6. If you're playing on a laptop, optimise your power management settings and graphics options for gaming.
  7. Follow the steps on the Preventing Overheating article to resolve any heat issues.
  8. Run the repair tool to resolve issues with damaged game files.
  9. Programs running in the background can interfere with the game. Close any running background applications.
  10. The file being read may be corrupt. Run Check disk and defragment your hard drive to try to repair any bad sectors.
  11. Missing system files may cause issues with Blizzard games. Run the System File Checker to scan for damaged or missing files in Windows.
  12. If the issue persists, uninstall your current copy of the game, then reinstall the game client.

Mac®

  1. Make sure you meet the Diablo III System Requirements.
  2. Update your video drivers. Even new computers can have out-of-date drivers, make sure to update your video drivers regularly. 
  3. Run Software Update to ensure you have installed all pending OS updates.

    Note: Using a modified OS on unsupported Apple hardware or using unsupported graphics cards in Mac Pros may cause performance issues. We do not support either for our games.
  4. Make sure the Battle.net App states Game is up to date for Diablo III.
  5. Your settings may be too high. Lower the maximum framerate.
  6. Follow the steps on the Preventing Overheating article to resolve any heat issues.
  7. Run the repair tool to resolve issues with damaged game files.
  8. Some MacBook Pro models have two separate graphics cards, which may require manual setup. Make sure your MacBook Pro is set to higher performance or automatic graphics switching is disabled. (15-inch, late 2008 | 17-inch, early 2009 | 15- and 17-inch, mid-2009 | 15-inch, mid-2010 and later | 17-inch, mid-2010 and later).
  9. Reset Folder & File Permissions to ensure there is no conflict between the latest OS update and your permissions.
  10. Programs running in the background can conflict with the Update Agent. Try closing background applications.
  11. Reset the System Management Controller (SMC) to reset the voltage to your graphics card.
  12. Repair Disk Permissions and Repair Disk to resolve OS or hard drive issues.
  13. The NVRAM stores settings related to your computer's devices and settings, such as your volume, display resolution, and startup disk. Try resetting your NVRAM.
  14. To reinstall drivers and files for the latest OS X build, you can download a Combo Update.
  15. Perform an Apple Hardware Test to rule out any hardware issues.
  16. If the issue persists, uninstall your current copy of the game, then reinstall the game client.

Tried everything here?

If you tried all the steps for your operating system and still need assistance, please visit our Technical Support Forum or contact us.

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