Asus P4S800-MX SE User Manual page 26

2. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56, USBPW78)
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 USBPW12 and USBPW34 jumpers are for the rear USB ports. The
USBPW56 and USBPW78 jumpers are 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 500mA on
2. The total current consumed must NOT exceed the power supply capability
P4S800-MX SE USB device wake up
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 500mA on the +5VSB
lead, and a corresponding setting in the BIOS.
P4S800-MX SE Keyboard power setting
1-16
the +5VSB lead on each USB port when these jumpers are set to +5VSB.
Otherwise, the system would not power up.
(+5VSB) whether under normal condition or in sleep mode.
USBPW34
USBPW12
1 2
+5V +5VSB
(Default)
USBPW56
USBPW78
1 2
+5V +5VSB
(Default)
KBPWR
1 2 2 3
+5V +5VSB
(Default)
Chapter 1: Product introduction
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