Asus P5GC-MR User Manual page 78

Slot Power [Auto]
Sets the slot power. Configuration options: [Auto] [Light] [Normal] [Heavy] [Heavier]
High Priority Port Select [Disabled]
Selects the high priority port. Configuration options: [Disabled]
[PCI Express Port 2] [PCI Express Port 3]
4-24 Chapter 4: BIOS setup