Asus P5Q3 - Manual (Page 47)

ASUS P5Q3 2-21
4. USB device wake-up (3-pin USBPW1-4, PS2_USBPW56, USBPW7-10,
USBPW1112)
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 and S4 sleep
modes.
The USBPW1-4/PS2_USBPW56 jumpers are for the rear USB ports. The
USBPW7-10/USBPW1112 jumpers are for the internal USB connectors that
you can connect to additional USB ports.
• The USB device wake-up feature requires a power supply that can provide
500mA on the +5VSB lead for each USB port; otherwise, the system will
not power up.
• The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.
3. Keyboard/Mouse power (3-pin PS2 USBPWR56)
This jumper allows you to enable or disable the keyboard/mouse wake-up
feature. Set this jumper to pins 2-3 (+5VSB) to wake up the computer when
you press a key on the keyboard/mouse (the default is the Space Bar). This
feature requires an ATX power supply that can supply at least 500 mA on the
+5VSB lead, and a corresponding setting in the BIOS.