Intel Arc GPUs Gain Resizable BAR Support Without BIOS Mods

Intel Arc graphics cards can now use Resizable BAR on some older motherboards that never shipped with native BIOS support for the feature, according to a report from VideoCardz.com. The change removes a step that previously forced owners of older boards to flash a modified, third-party BIOS before an Arc card could take advantage of the technology.

The report does not specify an exact list of affected motherboard chipsets, a driver version number, or a release date tied to the change, and HTT News could not independently verify those details beyond what VideoCardz published. Readers should treat the claim as reported by that outlet until Intel confirms the scope in its own release notes.

What Is Resizable BAR, And Why Did It Need A BIOS Mod?

Resizable BAR, often shortened to ReBAR, is a PCI Express feature that lets a computer's processor see and address a graphics card's entire video memory at once instead of the card's memory being split into smaller, 256-megabyte windows. The practical effect, on supported systems, is that the CPU can hand off larger batches of data to the GPU more efficiently, which can reduce bottlenecks in certain games and workloads.

Turning the feature on has always required support from three layers at once: the motherboard's firmware, the GPU's own hardware and driver, and the operating system. Newer motherboards built around Intel's and AMD's current chipsets generally expose a Resizable BAR toggle directly in their BIOS or UEFI settings. Older boards, particularly those built before ReBAR became a marketing checkbox around 2020, frequently never got that toggle added by the motherboard vendor. Enthusiasts worked around that gap by installing community-modified BIOS files, a process that voids warranties on many boards and carries a real risk of bricking the motherboard if it goes wrong.

Which Systems Does This Affect?

Because the underlying VideoCardz report does not list specific board models or chipset generations, HTT News is not able to say which older platforms are included. What is attributable to the report is the general claim: Arc GPUs are now described as gaining Resizable BAR functionality on motherboards that lack native BIOS-level support, without the owner needing to flash a modified firmware image.

That framing suggests Intel has moved some portion of the ReBAR enablement logic out of the motherboard firmware layer and into either the GPU driver or the card's own firmware, since those are the two components Intel controls directly. The company has not published a technical explanation of the mechanism in material reviewed for this story.

What Does This Mean For Owners Of Older Systems?

For someone running an Arc card in an older PC, the practical upside described in the report is avoiding a BIOS flash that many builders consider risky and that motherboard manufacturers do not support under warranty. If the change holds up across a range of older boards, it would lower the technical barrier for pairing an Arc GPU with a pre-2020 motherboard and still getting the performance behavior ReBAR is designed to enable.

It remains unclear from available reporting whether the fix is automatic, whether it requires a specific driver update, or whether it depends on the motherboard chipset generation. Buyers considering an Arc card for an older system should check Intel's own driver release notes once published, rather than relying solely on secondhand reporting.

What To Watch

• Whether Intel's official driver release notes confirm Resizable BAR support on non-native BIOS systems, and name which chipsets qualify.
• Whether motherboard vendors issue their own statements addressing compatibility, since ReBAR has traditionally required their firmware cooperation.
• Whether independent hardware outlets publish before-and-after benchmark comparisons showing measurable frame-rate differences tied specifically to this change, since none were available in the source material reviewed.
• Whether the mechanism extends to future Arc GPU generations or is limited to currently shipping cards.

Glossary

Resizable BAR (ReBAR): A PCI Express capability that allows the CPU to access a graphics card's full video memory in one address range instead of smaller segments, intended to reduce data-transfer overhead in supported games.

BIOS/UEFI: The firmware that runs when a computer powers on, before the operating system loads, and that exposes hardware settings such as the Resizable BAR toggle on supported motherboards.

BIOS mod: An unofficial, community-created firmware file applied to a motherboard to add features the manufacturer did not include, carrying a risk of permanent damage if the flash fails and typically voiding the warranty.

Read the original report via Google News.