Asus P5S-MX SE Manual page 37

Keyboard/mouse/USB device wake-up (3-pin USBPW1-4, USBPW56,
2.
PS2_USBPWR)
This jumper allows you to enable or disable the keyboard/mouse/USB device
wake-up feature. Set this jumper to +5V to wake up the computer from S1
sleep mode (CPU stopped, DRAM refreshed, system running in low power
mode) using the connected keyboard, mouse or USB devices. Set to +5VSB
to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow
refresh, power supply in reduced power mode).
P5S-MX SE
P5S-MX SE USB Device Wake Up
• 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 would not power up.
• The total current consumed must NOT exceed the power supply
capability (+5VSB) whether under normal condition or in sleep mode.
ASUS P5S-MX SE
PS2_USBPWR
1-25