Graphics hardware

What is Resizable BAR?

Resizable BAR is a PCI Express capability that can let a compatible processor access a larger portion of graphics memory at once.

QUICK EXPLANATION

Check compatibility before changing firmware settings

Support depends on the processor, motherboard firmware, graphics card and driver. Its performance effect varies by game; it is not a guaranteed FPS boost.

Enabling the option in firmware without checking platform requirements can affect boot or compatibility.

Result: The graphics vendor's software or system information may report whether the feature is active.

How to check it

Check the PC or motherboard maker's instructions and the graphics vendor's compatibility list first. Do not change UEFI settings on a managed or unfamiliar system without support.

Check: After any supported change, confirm Windows boots normally and the GPU software reports the expected state.

Sources & page details

Intel: What Is Resizable BAR and How Do I Enable It? ↗

Reviewed 2026-09-26

These are general explanations; available features and results vary by game, graphics hardware, driver and display.