How to Fix Day of Defeat: Source FPS Drop, Lag, and Stuttering Issues

Day of Defeat: Source suddenly stutters and FPS drops? Well, who will not be annoyed if you’re in the mid-game and you experience this issue? While the developer of Day of Defeat: Source has been properly optimizing the game, it seems that your PC is having some performance issues with the game. Worry not, as we will guide you to fix these problems in Day of Defeat: Source.

To fix the Day of Defeat: Source lag, sudden FPS drop, and stuttering, feel free to try all the recommended steps below.

Update Graphics Driver

Updating your graphics driver should always be your go-to option when your concern is Day of Defeat: Source FPS issues. Sometimes, you forget to update your drivers manually, resulting in your PC being outdated. Well, no wonder why you’re experiencing these FPS problems in Day of Defeat: Source.

According to the official driver release notes from AMD and Nvidia, both of these popular graphics card manufacturers provide optimal support for Day of Defeat: Source. If you’re not sure if you have the latest driver, you can download it manually or simply use Driver Booster to automatically download and install the correct GPU driver for your PC.

Step 1: Download and install Driver Booster

Step 2: Run Driver Booster and click the “Scan” button. The Driver Booster will then scan and detect any driver-related problems.

Step 3: Click the “Update Now” button to automatically download and install the correct drivers for your computer.

Step 4: Restart your PC for the update changes to take effect.

Step 5: Start Day of Defeat: Source and check if these crashing issues have been solved.

If the Day of Defeat: Source crashing problem persists, proceed to the next step.

Use Game Booster

If you have installed and used Driver Booster, then you can take advantage of its amazing feature: Game Boost. This feature will surely boost your overall FPS while playing Day of Defeat: Source.

For a better gaming experience, Driver Booster’s Game Boost feature will temporarily stop all unnecessary applications and services running in the background. If you want some applications to be active while Game Boost is enabled, you have the option to configure the feature.

Disable Steam Overlay

If you have the Steam Overlay enabled and the frame rate suddenly drops while playing Day of Defeat: Source, you can try disabling the Steam Overlay for Day of Defeat: Source. Here’s how you can disable the Steam Overlay:

1. Open Steam and go to Library
2. Right click on Day of Defeat: Source and click Properties
3. Uncheck the Enable Steam Overlay while in-game in the GENERAL tab

Re-launch Day of Defeat: Source to see if you achieve a better FPS.

Set Day of Defeat: Source to High Priority

This method will allow your system to prioritize and allocate more resources for Day of Defeat: Source. Using this method usually increases the performance of Day of Defeat: Source, resulting in a better framerate.

To set Day of Defeat: Source to high priority:

1. Open Day of Defeat: Source
2. While in-game, open Task Manager by pressing Ctrl + Shift + Esc key at the same time.
3. Go to the Details tab and find the main process of Day of Defeat: Source.
4. Right-click Day of Defeat: Source and hover your mouse to Set Priority then choose High.

Restart Day of Defeat: Source to see if there’s an FPS improvement.

Adjust Day of Defeat: Source Graphics Settings

Apart from the recommended methods above, you can also try adjusting the Day of Defeat: Source graphics in the settings section of the game. Feel free to experiment with the graphics options inside Day of Defeat: Source.