Razer PWM PC Fan Controller Firmware Updater | RZ34-02140

Updated: 14-Aug-2026 | Answer ID: 6255
This is a guide showing the latest version of the Razer PWM PC Fan Controller | RZ34-02140 firmware update and how to install it successfully.

A firmware updater is a tool that keeps your gaming gear running at its best. Installing the latest firmware can improve performance, fix known issues, and help devices work more smoothly and reliably.

Applicable models:

Firmware update v1.01.00_r2

Release notes

  • Fixed CFU compatibility issue on Win 11 (unable to install CFU driver on Win 11 issue)

Follow the detailed instructions below to run the updater on your device.

Step-by-step Process

Before you start

  1. If using a laptop, ensure it is plugged into a wall outlet. Do not let it run on battery alone.

  2. Save any open documents on your computer.

  3. Close all other programs.

  4. Download the latest firmware.

Update process

  1. Run the updater.

  2. Click "Yes" if the User Account Control window pops up to proceed.

  3. Click "NEXT" to proceed. The updater will close all running Razer applications.

  4. Connect the device to PC.

  5. Click "UPDATE".

    Connect the device to PC on-screen instruction window

  6. Wait until the update process is complete. Do not interrupt.

  7. Click "CLOSE" once the update is complete.

    Updater window showing the completion of the update process

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