Asus P5LD2-X/GBL - Manual (Page 44)

2-22 Chapter 2: Hardware information
P5LD2-X/GBL
P5LD2-X/GBL USB Device Wake Up
3 2 2 1
PS2_USBPW1-8
+5V
(Default)
+5VSB
2. USB device wake-up (3-pin PS2_USBPW)
This jumper allows you to wake up the computer from S1 mode (CPU
stopped, DRAM refreshed, system running in low power mode) using the
connected USB device. Set this jumper to pins 2-3 (+5VSB) to wake up the
computer from S3 and S4 modes (no power to CPU, DRAM in slow refresh,
power supply in reduced power mode).
The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.