Asus P8P67 (REV 3.1) - Manual (Page 88)

3-22 Chapter 3: BIOS setup
Chapter 3
Power On By Ring [Disabled]
[Disabled] Disables Ring to generate a wake event.
[Enabled] Enables Ring to generate a wake event.
Power On By RTC [Disabled]
[Disabled] Disables RTC to generate a wake event.
[Enabled] When set to [Enabled], the items RTC Alarm Date (Days) and Hour/
Minute/Second will become user-configurable with set values.