Asus M2N4-SLI - Manual (Page 40)

2-20 Chapter 2: Hardware information
2. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56,
USBPW78, USBPW910)
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 (no power to CPU, DRAM in slow refresh,
power supply in reduced power mode).
• 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.
R
M2N4-SLI
M2N4-SLI USB device Wake up
USBPW12
(Default)
+5V +5VSB
2
3
1
2
1 2
USBPW34
+5V
(Default)
+5VSB
3 2
3 2 2 1
+5V
(Default)
+5VSB
USBPW56
USBPW78
USBPW910