Asus Z8NA-D6 - Manual (Page 74)

4-12 Chapter 4: BIOS setup
SMART Monitoring [Auto]
Sets the Smart Monitoring, Analysis, and Reporting Technology.
Configuration options: [Auto] [Disabled] [Enabled]
32Bit Data Transfer [Enabled]
Enables or disables 32-bit data transfer.
Configuration options: [Disabled] [Enabled]