Asus Crosshair V Formula-Z - Manual (Page 100)

3-20 Chapter 3: BIOS setup
Chapter 3
3.5.2 North Bridge Configuration
HPC Mode [Disabled]
Allows you to enable or disable High Performance Computing (HPC) function.
Configuration options: [Enabled] [Disabled]
APM Master Mode [Auto]
Allows you to enable or disable Application Power Management (APM) function.
Configuration options: [Auto] [Enabled] [Disabled]
IOMMU [Disabled]
Set IOMMU to Enabled to show IOMMU Mode.
Configuration options: [Disabled] [Enabled]
IOMMU Mode [Disabled]
This item appears only when you set IOMMU item to [Enabled]. IOMMU is supported
on LINUX based systems to convert 32bit I/O to 64bit MMIO.
Configuration options: [Disabled] [64MB]