Hacker News

ReBarUEFI: Resizable BAR for almost any UEFI system

27 points by nateb2022 ago | 4 comments

marcus9999 |next [-]

this fixes a real annoyance on older workstation boards where above 4g decoding is a requirement but the option isn't even in the bios menu. saw a build recently on an x79 board where it had to be exposed with a hand patched bios before anything like this or a modern gpu would work at all.

bigwheels |previous [-]

What does this do? I perused the README but I'm still clueless on what the purpose and use-case is for ReBAR.

wmf |root |parent |next [-]

It allows the CPU to access all GPU VRAM. This improves gaming performance, especially for AMD GPUs.

mathisfun123 |root |parent |previous [-]

> what the purpose and use-case is for ReBAR

Literally the second sentence in the repo:

> This provides performance benefits and is even required for Intel Arc GPUs to function optimally.