Asus P5B-VM DO - Manual (Page 41)

ASUS P5B-VM DO 1-29
2. Keyboard power (3-pin KBPWR)
This jumper allows you to enable or disable the keyboard wake-up feature.
Set this jumper to pins 2-3 (+5VSB) 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.
R
P5B-VM DO
(Default)
+5V +5VSB
KBPWR
2
3
1
2
P5B-VM DO Keyboard Power Setting