In most cases, these settings are located in the following BIOS menu:
Setup → Advanced → PCI Subsystem Settings
If your BIOS supports them, both Above 4G Decoding and Re-Size BAR Support should be available there.
Where are the ReBAR and Above 4G Decoding options located in the BIOS of a Chinese X99 motherboard?
I know that some Chinese X99 motherboards don’t always include Re-Size BAR (ReBAR) or Above 4G Decoding options in the BIOS. Before digging through all the menus, I’d like to know where these settings are usually located. Where should I look for them in the BIOS?
Answer