ReBarUEFI unlocks Resizable BAR on almost any UEFI system
ReBarUEFI: Resizable BAR for almost any UEFI system
ReBarUEFI is a UEFI DXE driver that enables Resizable BAR on motherboards that lack official support. It patches the PCI host bridge to set BAR sizes from an NVRAM variable, boosting performance and meeting Intel Arc GPU requirements. The project includes UEFIPatch fixes for 64-bit BAR handling and a ReBarState tool. Users can achieve up to 12% FPS gains on older systems like an i5 3470 with RX 580.
On my system with an i5 3470 and Sapphire Nitro+ RX 580 8GB with Resizable BAR enabled in driver I get an upto 12% FPS increase with 2GB BAR size.