How to Lock Your Unreal Framerate

You can lock your Unreal Engine framerate using console commands.

Locking the framerate in Unreal Engine is a common task for developers and users. It helps maintain consistent performance, reduce heat generation, or simulate lower-end hardware. The primary method involves using console commands, which can be accessed within the editor or at runtime in a packaged game.

Using Console Commands

The most direct way to lock your framerate is through the console command t.MaxFPS. This command allows you to set a specific maximum frame rate limit.

How to use the t.MaxFPS command:

• In the Editor:

  • On the top right corner of the main Editor window, there is a text box that says “Enter console command here”.
  • Type “t.MaxFPS 30” to lock the Editor FPS to 30.
  • You can replace 30 with any desired numerical value (e.g., 60, 120, 999). Using 0 will disable the limit and allow the engine to run as fast as possible.

• In a Packaged Game:

  • While running the game, you can open the console by pressing the backtick (`) or tilde (~) key.
  • Type the command, for example, t.MaxFPS 60, and press Enter.

Examples of t.MaxFPS

Here are a few examples of the command:

• t.MaxFPS 60: Locks the framerate to 60 frames per second.
• t.MaxFPS 120: Locks the framerate to 120 frames per second.
• t.MaxFPS 0: Removes the framerate cap (runs uncapped).

This console command is a quick and effective way to control the engine's rendering speed. You can also set this command to execute automatically at startup through configuration files or Blueprints/C++ code for more permanent solutions.