Abit PD5NE User Manual page 45

Interuction of BIOS 3-17
can define for this mode any delay from 1 minute to 1 hour. If no power
management event occurs during this time period, meaning the computer is
inactive during this period, the system will enter the Standby power saving
mode.
If this mode is disabled, the system will enter the next mode in the sequence
(Suspend mode).