Power supply · low

How to fix Squealing coils from source

Error code: COIL-WHINE-PSU

What this error means

The power supply emits a very unpleasant high-frequency sound, especially when switched off or under load. The usual suspects are resonance of embedded chokes (coils) at certain PWM frequencies and enabled C-States saving features in BIOS.

Updated

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Disable C1E/C6 states in BIOS
  1. Disable C1E/C6 states in BIOS
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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02Activate ErP Ready in BIOS
  1. Activate ErP Ready in BIOS
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03This is not a functionality-limiting defect, it can only be complained about sometimes
  1. This is not a functionality-limiting defect, it can only be complained about sometimes
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • Resonance of embedded chokes (coils) at certain PWM frequencies
  • Enabled C-States saving features in BIOS