Asus P4S8X - Manual (Page 36)

24 Chapter 2: Hardware information
1. USB Device Wake-Up (3 x 3 pin USBPWR_12, _34, _56)
The default setting, [1-2] (+5V) disables the USB wake-up feature. Reset
these jumpers to pins [2-3] (+5VSB) to wake up the computer using USB
devices.
The USB device wake-up feature requires a power supply that can
provide at least 1A on the +5VSB lead. If this requirement is not met,
the system does not power up. The total current consumed must NOT
exceed the power supply capability (+5VSB) whether under normal
condition or in sleep mode. Also note that ONLY USB +5VSB can
support S3 resume function.
P4S8X
®
P4S8X USB Device Wake Up
USBPWR_56
(Default)
+5V
1 2
+5VSB
2 3
USBPWR_34
(Default)
+5V +5VSB
1
2 2
3
USBPWR_12
2.7 Jumpers
The jumpers on the motherboard allow you to change some feature settings
to suit your customized system configuration.