Asus Z9NA-D6 Manual page 84

PCI ROM Priority [EFI Compatible ROM]
In case of multiple option roms (Legacy and EFI Compatible), specifies what PCI
option rom to lanuch.Configuration options: [Legacy ROM] [EFI Compatible ROM]
PCI Latency Timer [32 PCI Bus Clocks]
The value is programmed into PCI latency timer register.
Configuration options: [32 PCI Bus Clocks] [64 PCI Bus Clocks] [96 PCI Bus Clocks]
[128 PCI Bus Clocks] [160 PCI Bus Clocks] [192 PCI Bus Clocks] [224 PCI Bus
Clocks] [248 PCI Bus Clocks]
VGA Palette Snoop [Disabled]
Enables or disables VGA pallette registers snooping.
Configuration options: [Disabled] [Enabled]
PERR# Generation [Disabled]
Enables or disables PCI device to generate PERR#.
Configuration options: [Disabled] [Enabled]
SERR# Generation [Disabled]
Enables or disables PCI device to generate SERR#.
Configuration options: [Disabled] [Enabled]
Load RT32 Image [Enabled]
Enables or disables RT32 image loading.
Configuration options: [Disabled] [Enabled]
4-24 Chapter 4: BIOS setup