Below are some steps you should take if the updated League client is slow, laggy, or freezing up on your computer.
Note: These steps are intended to improve client performance, not in-game performance. If you're seeing lag or FPS drops in-game, please enable the Close Client During Game function at the top of your League settings, or check out our low FPS guide.
Enable Low Spec mode
Low spec mode turns off several client animations and visual effects. In return, you should see a performance increase. You can find low spec mode by going to your League settings (the cog at the top right of the client) and checking the box next to "Enable Low Spec Mode" on the first settings page.
Use the client's default window size.
The client runs best at default window size: 1280x720. Use the Restore Defaults button in the top right of the settings page to reset the size.
Try to use a wired internet connection
A weak internet connection can cause the client to lag, especially during champion select. You can learn more about your internet connection's impact on the game here.
Close applications and programs you don't need.
Some applications may use a lot of your computer's resources while you're playing or navigating the client. Close any applications you're not actively using to improve performance.
Make sure your software is up-to-date
You should also check to make sure you're using the latest version of your operation system. Windows users can update their operating system by navigating to the start menu and searching for "Windows Update". Mac users can click the Apple icon and click "Software Update" to check for and apply any updates.
Make sure your computer is using its dedicated graphics card
This guide will walk you through setting up your dedicated graphics card.
Configure your firewall and antivirus
Aggressive firewall and antivirus settings can slow down the client, and potentially prevent you from connecting to champion select or a match. Please refer to our firewall troubleshooting guide to make sure your firewalls will work with the client.
Ensure you have enough space in your hard drive for League
A full hard drive can cause the client, or even your computer, to operate slowly. League requires 8 GB of space to run, but may take up to 12 GB as new patches replace old files.
We also recommend periodically defragmenting your computer if you're on Windows. You can learn how to do so here.
Double-check League's minimum and recommended system requirements
League will run on minimum specs, but you'll see much better performance if your computer hits our recommended specs. You can review the system requirements here.