Asus KFN5-Q/SAS - Manual (Page 49)

2-28 Chapter 2: Hardware information
7. USB device wake-up (3-pin USBPW12, USBPW34)
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 S4 sleep mode (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 will not power up.
• If you are using Windows ® 2000, you need to install Service Pack 4
to wake up the system from S4 sleep mode.
• The total current consumed must NOT exceed the power supply
capability (+5VSB) whether under normal condition or in sleep mode.
KFN5-Q/SAS
KFN5-Q Series USB Device Wake-Up
USBPW12
(Default)
+5V +5VSB
2 3 1 2
(Default)
+5V +5VSB
2 3 1 2
USBPW34