User's and BIOS Manual (1.0a)

Chapter 7: BIOS
7-13
SERR Signal Condition
This setting specifies the conditions required to be qualified as an ECC
error. Options are None, Single Bit, Multiple Bit and Both.
USB Function
This setting allows you to Enable or Disable all functions for the USB
devices specified.
Legacy USB Support
This setting allows you to enable support for Legacy USB devices. The
settings are Enabled and Disabled.