Article ID: 000090831 Content Type: Product Information & Documentation Last Reviewed: 08/08/2022

What Is Resizable BAR and How Do I Enable It?

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Summary

Explains what is Resizable BAR, how to enable it, and describes how it can impact performance.

Description

What is resizable bar? How do I enable it for my system?

Resolution

Resizable BAR (Base Address Register) is a PCIe capability. This is a mechanism that allows the PCIe device, such as a discrete graphics card, to negotiate the BAR size to optimize system resources. Enabling this functionality can result in a performance improvement.

To enable Resizable BAR, check the system firmware (BIOS) settings to enable it.

For more information, or to check if your system supports resizable BAR, contact the system or motherboard manufacturer for support.

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