Laptop "Coil Whine" (High-pitched buzzing)
4.5
A very faint, high-pitched whistling or buzzing sound comes from the laptop when it's under load.
Symptoms
- High-pitched noise
- Whistling
- Changes with CPU load
Possible Causes
- Vibrating inductors (coils)
- High voltage switching
Step-by-Step Fix
1
Limit Frame Rate
If it happens during games, capping the FPS can reduce the electrical load.
2
Change Power Plan
Sometimes "Balanced" mode reduces the voltage switching that causes the noise.
3
Ignore It
Coil whine is not a sign of failure; it is just a physical characteristic of some electronics.
When to See a Technician
Coil whine is caused by the physical vibration of the copper coils as electricity passes through them.
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