Why Is My Laptop Making a Buzzing Noise and How to Reduce or Fix it.

Before You Begin:

This article continues where the Dell Support Library page Computer Making Noises? Troubleshoot Loud Fans, Hard Drive & More ends.

Prerequisites: Before proceeding with these advanced steps, ensure that you have:

• Try to Identify the Noise Source
• Perform an Isolation Test
• Updating Drivers and BIOS
• Running Dell Hardware Diagnostics

What Is the High-Pitched Buzzing Noise?

In certain situations, an intermittent, high-frequency buzzing noise may be heard from your system. It appears to change with processor activity and can increase in frequency if USB devices are attached.

This buzzing noise is noticeable on all laptops but seems abnormal because it differs from the usual computer sounds.

Root Cause:

The noise has been isolated to the processor's power circuit and is only audible when the processor is in the C3 (clock-stopped) power state. In this state, the computer is in a low-power mode designed to reduce chassis heat and extend the battery life. The changes to the components in the processor's power circuit are caused by a phenomenon referred to as the Piezoelectric Effect.

When a specific voltage is applied to these components, they begin to resonate, producing sounds that fall within the range of human hearing (15–20 kHz). The noise is normal and within the acoustic specifications of the computer.

Workaround: Preventing the Processor from Entering C3 Power State:

However, in the event, the buzzing is annoying, there is a workaround that can be performed, preventing the computer from entering the C3 state, thus minimizing the noise. Enabling bus mastering devices, such as the onboard Bluetooth radio, prevents the processor from entering the C3 power state. This prevents the intermittent, high-frequency buzzing noise from occurring.

Steps to Enable the Bluetooth Radio in Windows

To enable the Bluetooth radio, perform the following steps:

1. In the Search box, type Bluetooth, and then select Bluetooth and other devices settings.
2. Ensure the slider to the right of Bluetooth is set to On.

Frequently Asked Questions:

Q: Is the high-pitched buzzing noise dangerous to my laptop?
A: No. The noise is normal and within the acoustic specifications of the computer.

Q: Will upgrading or replacing hardware fix the buzzing?
A: No. Replacing parts does not end the buzzing. However, in the event, the buzzing is annoying, there is a workaround that can be performed, preventing the computer from entering the C3 state, thus minimizing the noise.

Q: Does fan noise during gaming require the same fix?
A: No — that is a separate issue. Fan noise may increase during high-performance tasks like gaming, but should not be excessively loud. Fan-related noise troubleshooting is covered in the Dell Support Library page Computer Making Noises? Troubleshoot Loud Fans, Hard Drive & More.

Q: What is the best long-term fix for hard drive-related noise?
A: An SSD (solid state drive) is quieter and improves performance compared to traditional hard drives (HDDs).

Q: Can software cause the buzzing?
A: Generally, software does not cause physical noises; however, it can lead to increased hardware activity, which may amplify existing sounds.

There are other reasons computers make noises such as a loud CPU fan, slight buzzing, or a humming noise. See the following Dell Knowledge Base articles for help with determining and reducing or with eliminating the sound.

• Troubleshoot Noise Coming from the AC Adapter
• Audio Distortion or Speaker Static Noise on Select Dell Latitude, XPS, Inspiron, Precision, and Vostro Laptops
• Computer Making Noises? Troubleshoot Loud Fans, Hard Drive & More
• How to Identify and Resolve Noise Issue on Dell Laptop PCs
• Identify Speakers Emitting Unwanted Noise