Asus P5SD2-A - Manual (Page 16)

• The USB device wake-up feature requires a power supply that can provide 500mA on
the +5VSB lead for the 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.
1.6 Jumpers
1. Keyboard/mouse/USB device wake-up (3-pin USBPW1-4, USBPW5-8, 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).
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