#AMD BIOS Settings

Note: Most of these options may not be present in your firmware, we recommend matching up as closely as possible but don’t be too concerned if many of these options are not available in your BIOS
#Disable
Fast Boot
Secure Boot
Serial/COM Port
Parallel Port
Compatibility Support Module (CSM)(Must be off, GPU errors like gIO are common when this option in enabled)
Special note for 3990X users: macOS currently does not support more than 64 threads in the kernel, and so will kernel panic if it sees more. The 3990X CPU has 128 threads total and so requires half of that disabled. We recommend disabling hyper threading in the BIOS for these situations.
#Enable
Above 4G decoding(This must be on, if you can’t find the option then add npci=0x2000 to boot-args. Do not have both this option and npci enabled at the same time.)

• If you are on a Gigabyte/Aorus or an AsRock motherboard, enabling this option may break certain drivers(ie. Ethernet) and/or boot failures on other OSes, if it does happen then disable this option and opt for npci instead
• 2020+ BIOS Notes: When enabling Above4G, Resizable BAR Support may become an available on some X570 and newer motherboards. Please ensure this is Disabled instead of set to Auto.

EHCI/XHCI Hand-off
OS type: Windows 8.1/10 UEFI Mode
SATA Mode: AHCI