Diablo II Running Slow or Choppy


If Diablo II is running slowly on your system, follow the steps for your operating system below.


  1. Programs running in the background can interfere with the game. Close any running background applications.
  2. The game requires up-to-date drivers to run smoothly. Update your drivers regularly.
  3. Disabling the Automap may improve performance during gameplay. Press Tab in-game to cycle the Automap on and off.
  4. If you are running the game in 3D mode, try 2D mode:
    • Click on Start > All Programs > Diablo II > Video Test.
    • Run the test and select 2D as your option.
  5. The file being read may be corrupt. Run Check disk and defragment your hard drive to try to repair any bad sectors.
  6. If you are running the game in fullscreen mode, try windowed mode:
    • Click Start.
    • Click All Programs.
    • Double click the Diablo II folder.
    • Right-click the Diablo II shortcut and select Properties.
    • In the Target field, add a -w after the quotes.
    • Click OK.
Advanced Troubleshooting
  1. Make sure that you are running the latest version of your motherboard's BIOS software. This usually comes on a floppy diskette or CD included with the motherboard itself, and it should also be available on the manufacturer's website.
  2. VIA Motherboard Users should talk to their motherboard manufacturers about downloading the 4-in-1 driver update, which automatically detects and updates IRQ, AGP, IDE, and INF settings. This patch should correct sluggish gameplay on high-end systems and prevent lockups on VIA motherboards.
  3. If you continue to experience sluggish gameplay and choppiness, try these steps to reduce CD access and read times:
    • Uninstall Diablo II.
    • Copy the D2CHAR.MPQ and the D2MUSIC.MPQ files from the Diablo II Play Disc into the Diablo II directory on your hard drive.
    • Select both files, right-click, select Properties and uncheck Read only.
    • Reinstall Diablo II. 


Mac OS version 9.0 or greater, and all versions of Mac OS X, may experience a decrease in Diablo II's performance. The slowdown is due to inefficiencies in the video card drivers included with those versions of the Mac OS.

  1. While 3DFX is no longer in operation, Voodoofiles.com has been hosting many of the drivers on their website. You maybe able to find a driver that will work for your video card there. The Voodoo 4/5 PCI v1.0.1 and Voodoo 4/5 PCI v1.1.2 drivers have been tested with Diablo II and they appear to work properly. These drivers support all the Voodoo 5 and Voodoo 4 PCI cards, as well as many of the older Voodoo 3 PCI cards.

    Note: The Carbon versions of Diablo II and Diablo II: Lord of Destruction do not support 3DFX cards.
  2. If you have an aftermarket ATI card installed in your computer, use the most recent drivers available from ATI for your video card and operating system. To obtain the most recent video card drivers from ATI, visit the ATI AMD Support & Drivers page.
  3. With Classic versions of the Mac OS, restart with extensions off and remove all the old video card extensions, control panels, and preferences files before you install new driver software. To do this, hold the Shift key while the computer starts up. You can also use the Extension Manager control panel to create a custom Diablo II extension set:
    • Open the Extension Manager control panel. Select the Mac OS Base extension set using the choice bar at the top to the window. Add any video card extensions and control panels you may need to this set and save it as Diablo II Set.
    • Open the Memory control panel. Set Virtual Memory to 128MB or more.
    • Restart the computer.
    • Hold down the Command and Option keys as the computer starts up. Hold these keys until you are prompted to rebuild the desktop file.
    • Allow the computer to rebuild the desktop file.
Advanced Troubleshooting

To optimize game performance, follow these tips:

Startup Options Configuration

  1. Hold down the Option key while you start Diablo II or Diablo II: Lord of Destruction. A small window will appear with startup options for the game.
  2. Select the Configure Video option.
  3. Click Rescan Monitors.
  4. Select the Software option by clicking on the radio button with that label.
  5. Click on the right arrow button in the lower right-hand corner of the window.
  6. Click the checkbox labeled Expert Mode. You will see a choice bar appear.
  7. Click the choice bar and select the lowest refresh rate listed, then click on the Test button and wait for a picture to appear on the screen.
  8. Click the button labeled OK at the bottom of the test screen.
  9. Click the right arrow button in the lower right-hand corner of the window.
  10. Repeat steps 6 to 8 once, then repeat step 9 twice.
  11. You should be back to the startup options screen. Press Return or click OK on this screen.

In-Game Options Configuration

  1. Start a Single Player game of Diablo II or Diablo II: Lord of Destruction.
  2. Press the Esc key once the character appears in town.
  3. Select the Options menu item.
  4. Select the Video Options menu item.
  5. If you have Diablo II: Lord of Destruction, set Resolutions to 640x480.
  6. Set Lighting Quality to Low.
  7. Set Blended Shadows to Off.
  8. Return to the Options menu and select Audio Options.
  9. Turn the Music Volume all the way down.
  10. Return to the game screen.

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 or contact us.

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