Loss of Thread Synchronization (SMT)

What is SMT-SYNC-FAIL?

The SMT-SYNC-FAIL error is categorized as a high-severity processor (CPU) issue that can significantly impact your PC's stability. The logical cores have lost synchronization with each other. When experiencing the Loss of Thread Synchronization (SMT) 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 dried thermal paste, overclocking too aggressively, silicon degradation and weak power supply. To permanently resolve the SMT-SYNC-FAIL issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your processor (CPU) components are functioning correctly.

Common Causes

• Dried thermal paste
• Overclocking too aggressively
• Silicon degradation
• Weak power supply

Step-by-Step Fix Guide

• 1
  Improve cooling and repast

  Applying the first fix (Improve cooling and repast) addresses the most common root cause of SMT-SYNC-FAIL and restores baseline functionality.

• 2
  Increase LLC (Load-Line Calibration) in BIOS

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

• 3
  Undervolting

Commands & Diagnostics