Asus MOTHERBOARD ULTRA P5V-VM - Manual (Page 32)

1-22 Chapter 1: Product Introduction
2. USB device wake-up (3-pin PS2_USB_PWR)
Set this jumper to +5V to wake up the computer from S1 sleep mode (CPU
stopped, DRAM refreshed, system running in low power mode) using the
connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep mode
(no power to CPU, DRAM in slow refresh, power supply in reduced power mode).
• The USB device wake-up feature requires a power supply that can provide
500mA on the +5VSB lead for each USB port; otherwise, the system would
not power up.
• The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.
P5V-VM
ULTRA
P5V-VM ULTRA USB Device Wake Up
3 2 2 1
+5V +5VSB
PS2_USB_PWR
(Default)