Answer

Some USB 3.x devices, ports, or cables may generate electromagnetic noise near the 2.4 GHz frequency band during operation. If a 2.4 GHz wireless receiver is placed too close to a USB 3.x device, port, or cable, interference may occur, causing a wireless mouse, keyboard, or other 2.4 GHz wireless device to experience delayed response, unstable connections, or reduced operating range.

If you encounter any of the above issues, refer to the following information and troubleshooting methods.

This article applies to all MSI notebook.

Possible Symptoms

When a 2.4 GHz wireless receiver is placed too close to a USB 3.x device, the following symptoms may occur:

• The wireless mouse cursor moves inconsistently or responds slowly.


• Wireless keyboard input is delayed or occasionally unresponsive.


• The wireless device disconnects intermittently.


• The effective operating range of the wireless device is reduced.


• The issue becomes more noticeable after connecting a USB 3.x external hard drive, USB flash drive, USB hub, or docking station.

Why Can USB 3.x Affect 2.4 GHz Wireless Devices?

During high-speed data transmission, USB 3.x devices, ports, or cables may generate broadband noise that overlaps with the 2.4 GHz frequency band.

If a 2.4 GHz wireless receiver is placed too close to these sources of interference, wireless signal reception may be affected, resulting in delayed response, unstable connections, or reduced operating range.

This is a type of electromagnetic interference that may be generated by high-speed USB signals. It does not necessarily indicate a hardware failure of the computer, USB port, or wireless device.

How to Reduce USB 3.x Interference with 2.4 GHz Wireless Devices?

1. Move the wireless receiver to another USB port
   
   Connect the 2.4 GHz wireless receiver to a USB port farther away from the USB 3.x device.
   
   If USB ports are available on both sides of the notebook, connect the wireless receiver and the USB 3.x device on opposite sides to increase the distance between them.


2. Use a USB extension cable to reposition the receiver
   
   If changing USB ports does not provide enough separation, use a USB extension cable to move the wireless receiver farther away from the USB 3.x device. It is also recommended to place the receiver closer to the wireless mouse or keyboard to improve wireless signal reception.


3. Avoid connecting the wireless receiver next to a USB 3.x device
   
   Avoid connecting the 2.4 GHz wireless receiver directly next to a USB 3.x external hard drive, USB flash drive, or other high-speed USB device. If the wireless receiver is too close to a USB 3.x device, electromagnetic noise may affect wireless connection quality even when both devices are operating normally.


4. Temporarily disconnect the USB 3.x device for testing
   
   Temporarily disconnect USB 3.x devices near the wireless receiver, and then test the wireless mouse or keyboard again. If the device operates normally after the USB 3.x device is disconnected, the issue may be related to interference generated by the USB 3.x device, port, or cable.


5. Reduce the distance between the wireless device and receiver
   
   Move the wireless mouse, keyboard, or other wireless device closer to the receiver. Avoid placing metal objects, docking stations, or other large electronic devices between the wireless device and receiver.

FAQ

Q: Do all USB 3.x devices affect 2.4 GHz wireless devices?

A: Not necessarily. The level of interference may vary depending on the shielding design of the USB device and cable, the connection location, and the distance between the wireless receiver and the USB 3.x device. If the wireless device is operating normally, no adjustment is required.

Q: Why does the wireless mouse or keyboard experience problems only after a USB 3.x device is connected?

A: Some USB 3.x devices, ports, or cables may generate electromagnetic noise near the 2.4 GHz frequency band during high-speed data transmission. If the wireless receiver is close to the source of interference, the mouse or keyboard may experience delayed response, interrupted input, or reduced operating range.

Q: Why does the wireless mouse or keyboard return to normal after the USB 3.x device is disconnected?

A: Disconnecting the USB 3.x device may reduce nearby electromagnetic noise, allowing the wireless receiver to receive signals normally. If the issue can be resolved by disconnecting the USB 3.x device or repositioning the receiver, it usually does not indicate a hardware failure of the computer or wireless device.

Q: Can interference from USB 3.x also affect Bluetooth devices?

A: Possibly. Bluetooth also uses the 2.4 GHz frequency band. If a Bluetooth device or the computer's wireless antenna is close to a USB 3.x source of interference, the connection may become unstable, audio may be interrupted, or the effective operating range may be reduced. If only Bluetooth devices are affected, also refer to [Troubleshooting] Bluetooth Connection Is Unstable or Disconnects.

Reference

USB 3.0 Radio Frequency Interference Impact on 2.4 GHz Wireless Devices