Asus Pundit-S - Manual (Page 45)

ASUS Book Size Barebone System 5-9
5.7 Jumpers
1. USB device wake-up (3-pin USBPWR12,USBPWR34,USBPWR56)
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). Both jumpers are set to pins 1-2 (+5V) by default because not all
computers have the appropriate power supply to support this feature.
The USBPWR12 and USBPWR34 jumpers are for the rear USB port.
USBPWR56 is for the internal USB header that you can connect to the front
USB ports.
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.
The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.
P4S8L
®
P4S8L USB Device Wake Up
+5VSB +5V
(Default)
USBPWR56
2 3 1 2
+5VSB +5V
(Default)
USBPWR34
2 1 3 2
USBPWR12
+5VSB +5V
(Default)
1
2 2
3