Graphics · low

How to fix Resizable BAR (SAM) causes performance degradation

Error code: RESIZABLE-BAR-ERROR

What this error means

FPS drops in some games after enabling Resizable BAR (AMD Smart Access Memory) or nVidia NVLink. This usually traces back to an outdated VBIOS of the video card does not fully support ReBAR and incorrect configuration of Above 4G Decoding in BIOS.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
01Update both board BIOS and graphics card VBIOS
  1. Update both board BIOS and graphics card VBIOS
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
02Make sure Above 4G Decoding is turned on BEFORE enabling ReBAR
  1. Make sure Above 4G Decoding is turned on BEFORE enabling ReBAR
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
03Test performance with ReBAR on and off
  1. Test performance with ReBAR on and off
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

  • An outdated VBIOS of the video card does not fully support ReBAR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

Useful Windows tools

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dxdiag