Resizable BAR (SAM) causes performance degradation

What is RESIZABLE-BAR-ERROR?

The RESIZABLE-BAR-ERROR error is categorized as a low-severity graphics card (GPU) issue that can significantly impact your PC's stability. FPS drops in some games after enabling Resizable BAR (AMD Smart Access Memory) or nVidia NVLink. When experiencing the Resizable BAR (SAM) causes performance degradation 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diagnostic scenarios, this problem is directly triggered by underlying hardware or software complications such as an outdated vbios of the video card does not fully support rebar, the game does not have a profile for resizable bar (blacklist) and incorrect configuration of above 4g decoding in bios. To permanently resolve the RESIZABLE-BAR-ERROR issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your graphics card (GPU) components are functioning correctly.

Common Causes

• An outdated VBIOS of the video card does not fully support ReBAR
• The game does not have a profile for Resizable BAR (blacklist)
• Incorrect configuration of Above 4G Decoding in BIOS

Step-by-Step Fix Guide

• 1
  Update both board BIOS and graphics card VBIOS

  Applying the first fix (Update both board BIOS and graphics card VBIOS) addresses the most common root cause of RESIZABLE-BAR-ERROR and restores baseline functionality.

• 2
  Make sure Above 4G Decoding is turned on BEFORE enabling ReBAR

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

• 3
  Test performance with ReBAR on and off

Commands & Diagnostics