PCIe bifurcation error

What is PCIE-BIFURCATION-ERROR?

The PCIE-BIFURCATION-ERROR error is categorized as a medium-severity motherboard issue that can significantly impact your PC's stability. The motherboard incorrectly distributes the PCIe lines for the adapter (NVME RAID, PLX switch). When experiencing the PCIe bifurcation error 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 bifurcation disabled in bios, the adapter requires a x4x4 bifurcation and the board does not support bifurcation. To permanently resolve the PCIE-BIFURCATION-ERROR issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your motherboard components are functioning correctly.

Common Causes

• Bifurcation disabled in BIOS
• The adapter requires a x4x4 bifurcation
• The board does not support bifurcation

Step-by-Step Fix Guide

• 1
  Turn on PCIe bifurcation in BIOS

  Applying the first fix (Turn on PCIe bifurcation in BIOS) addresses the most common root cause of PCIE-BIFURCATION-ERROR and restores baseline functionality.

• 2
  Check the board manual

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

• 3
  Verify slot support for bifurcation