Asus P4SDR-VM - Manual (Page 38)

2-16 Chapter 2: Hardware information
3. USB device wake-up (3-pin USBV1, USBV2, USBV3)
Set these jumpers 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 sleep mode (no power to CPU, DRAM in slow refresh, power
supply in reduced power mode).
The USBPV1 jumper is for the rear USB ports. The USBV2 and
USBV3 jumpers are for the internal USB headers.
1. This feature requires a power supply that can provide at least 1A
on the +5VSB lead when these jumpers are set to +5VSB.
Otherwise, the system does not power up.
2. The total current consumed must NOT exceed the power supply
capability (+5VSB) whether under normal condition or in sleep
mode.
P4SDR-VM
®
P4SDR-VM USB Device Wake Up
USBV2
USBV1
+5VSB
3
2
+5V
(Default)
1
2
USBV3
+5VSB
3 2
+5V
1 2
(Default)