Gigabyte GA-990XA-UD3 User Manual page 42

Halt On
Allows you to determine whether the system will stop for an error during the POST.
All Errors Whenever the BIOS detects a non-fatal error the system boot will stop.
No Errors The system boot will not stop for any error.
All, But Keyboard The system boot will not stop for a keyboard error but stop for all other errors.
(Default)
Memory
These fields are read-only and are determined by the BIOS POST.
Base Memory Also called conventional memory. Typically, 640 KB will be reserved for the
MS-DOS operating system.
Extended Memory The amount of extended memory.
BIOS Setup - 42 -