Squealing coils from source

What is COIL-WHINE-PSU?

The COIL-WHINE-PSU error is categorized as a low-severity power supply unit (PSU) issue that can significantly impact your PC's stability. The power supply emits a very unpleasant high-frequency sound, especially when switched off or under load. When experiencing the Squealing coils from source fault, users often report sudden system crashes, unresponsive behavior, or a blue screen of death (BSOD). In most diagnostic scenarios, this problem is directly triggered by underlying hardware or software complications such as resonance of embedded chokes (coils) at certain pwm frequencies and enabled c-states saving features in bios. To permanently resolve the COIL-WHINE-PSU issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your power supply unit (PSU) components are functioning correctly.

Common Causes

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

Step-by-Step Fix Guide

• 1
  Disable C1E/C6 states in BIOS

  Applying the first fix (Disable C1E/C6 states in BIOS) addresses the most common root cause of COIL-WHINE-PSU and restores baseline functionality.

• 2
  Activate ErP Ready in BIOS

  If the problem persists, proceeding with the remaining steps ensures all edge cases related to psu instability are covered.

• 3
  This is not a functionality-limiting defect, it can only be complained about sometimes

Commands & Diagnostics