Asus P4S800-MX - Manual (Page 24)

1-16 Chapter 1: Product introduction
3. Keyboard power (3-pin KBPWR1)
This jumper allows you to enable or disable the keyboard wake-up feature. Set
this jumper to pins 2-3 (+5VSB) if you wish to wake up the computer when you
press a key on the keyboard (the default is the Space Bar). This feature
requires an ATX power supply that can supply at least 1A on the +5VSB lead,
and a corresponding setting in the BIOS (see 2.5.5 “APM Configuration”).
2. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56)
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 USBPW_12 and USBPW_34 jumpers are for the rear USB ports. The
USBPW_56 jumper is for the internal USB header that you can connect to the
front USB ports.
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
would not power up.
2. The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.
+5V
(Default)
+5VSB
2
1
3
2
P4S800-MX
P4S800-MX USB Device Wake Up
USBPW12
USBPW34
2 3 2 1
+5V
(Default)
+5VSB
USBPW56
P4S800-MX
P4S800-MX Keyboard Power Setting
(Default)
+5V +5VSB
KBPWR1
2 3 1 2