High CPU Usage

Owned by Jummain
Last updated: 18 Jan 2022

We understand that it is very important to be able to use Zoom properly, without disruption caused by system crashing and frozen during meeting.

Systems crashing and frozen screen sharing issues are often related to high CPU usage.

To prevent this from happening, please ensure that all unnecessary application that is running on your computer and at the background are closed.

 Close all other applications

Open the Task Manager (or Activity Monitor), and go to the CPU list. See what apps are using the most CPU and shut down those not required for the meeting. Also avoid high bandwidth activities like uploading/downloading of large files, syncing of cloud storage and video streaming.

Do upgrade to the latest Zoom client version for the best meeting experience by Checking for Update regularly.

Below are some tips to help reduce CPU Usage:

Video Optimization

These will help minimize CPU required to process non-essential Zoom video settings.

  • Open the Zoom Desktop Client on your computer.
    1. Click on Settings
    2. Click on Video
    3. Uncheck all, but most importantly:
      1. HD (Use Original ratio instead)
      2. Mirror my video
      3. Touch up my appearance

    4. Active Speaker/Gallery View

      • When in a meeting use Active Speaker View instead of Gallery view
      • If you are viewing 49 participants per screen instead of 25, change it back to 25.
        1. Click on Settings
        2. Click on Video
        3. Set maximum participants displayed per screen in Gallery View to 25 participants.



Clean Uninstall and Reinstall Zoom Client

Please see steps below:

  1. Uninstall the Zoom app using this CleanZoom.exe 500 KB Download file.
  2. Then download the 64bit version of the Zoom Client for Meetings app and install it.
  3. When running a Zoom meeting and sharing screen, try to close the other applications running from the device.


Change Video Rendering Method

Please see steps below:

  1. Sign in to the Zoom desktop client.
  2. Click your profile picture, then click Settings.
  3. Click the Video tab.
  4. Click Advanced.
  5. In Video Rendering Method, click the dropdown menu and select Direct3D9. 
  6. Close the Settings window and restart the Zoom desktop client. 

To Monitor your Zoom Usage Statistics

Please see steps below:

  1. Sign in to the Zoom desktop client.
  2. Click your profile picture, then click Settings.
  3. Click the Statistics tab
  4. Toggle the Overall, Audio, Video and Screen Sharing tabs respectively