The main cause is having graphics settings that are too high for your graphics card, using more video memory (VRAM) than the card has available. This is especially common with cards like the RX 580 or GTX 1660. Other possible reasons include outdated drivers, software overlays interfering with the game, or issues with fullscreen optimizations. To fix this, try lowering your graphics settings, updating your drivers, and turning off overlays or fullscreen optimizations. Before moving on to specific solutions, here are some basic steps that might help fix the issue: If the issue continues, try the solutions below.
1. Disable G-Sync (NVIDIA Card Users)
G-Sync is a feature that helps eliminate screen tearing when your GPU sends more frames than your display can handle. While it can be helpful, G-Sync can sometimes cause gaming errors like Dev Error 6065. Disabling G-Sync can often resolve the issue.
2. Disable Full-Screen Optimizations
Windows 10 includes a feature called “Full-screen optimization“, which is intended to improve app and game performance in full-screen mode. However, this feature can sometimes create problems for some games. Disabling it might resolve Dev Error 6065. Close the game completely, making sure to end any related processes in Task Manager. Here’s how, using the Blizzard client as an example:
3. Adjust the Call of Duty Folder
Call of Duty saves its settings in the “Players” and “Players 2” folders inside its main documents folder. If the configuration files in these folders are corrupted, it could cause Dev Error 6065. Renaming these folders forces the game to recreate them with default settings.
4. Scan and Repair Call of Duty’s Game Files
Corrupted game files can cause many issues, including Dev Error 6065. Most launchers, including the Blizzard client, have a feature to scan and repair game files.
5. Adjust Graphics Card Settings and Drivers
Misconfigured graphics card settings or drivers can also lead to Dev Error 6065. Try the following:
5.1. Disable Extra Graphics Card
If your computer has both an integrated and a dedicated graphics card, disabling the integrated card might fix the problem.
5.2. Roll Back Graphics Drivers
If Dev Error 6065 started after updating your graphics card’s drivers, reverting to a previous version may help.
5.3. Edit the Config.cfg File
The “Config.cfg” file stores your game’s configuration. Incorrect graphics card entries here can trigger errors.
6. Adjust the Game’s Graphics Settings
Sometimes Call of Duty may not run well if all graphics settings are maxed out, especially on certain systems. Try running the game on its default settings, or apply the following changes. If Dev Error 6065 happens as soon as you launch the game, you can start in Safe Mode (when prompted after a crash, select “Yes”). If the problem continues, try setting the Texture Resolution to “Low”, the Frame Rate Limit to 60, and Shadow Map Resolution to “Low”.
7. Reinstall the Game
If none of the above steps worked, it may be necessary to uninstall and reinstall Call of Duty. Although this isn’t ideal due to the size of the game and download time, it can fix stubborn problems.
