Asus P4P800S SE P4P800S SE user's manual English version E1483 - Page 28

2. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56, USBPW78) 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 sleep mode (no power to CPU, DRAM in slow refresh, power supply in reduced power mode). All jumpers are set to pins 1-2 (+5V) by default because not all computers have the appropriate power supply to support this feature. The USBPW12 and USBPW34 jumpers are for the rear USB ports. The USBPW56 and USBPW78 jumpers are for the internal USB header that you can connect to the front USB ports. 1. This feature requires a power supply that can provide at least 2A on the +5VSB lead when these jumpers are set to +5VSB. Otherwise, the system does not power up. 2. The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal or in sleep mode. USBPW12 USBPW34 12 23 P4P800S SE ® +5V (Default) +5VSB USBPW78 USBPW56 12 23 +5V P4P800S SE USB Device Wake Up (Default) +5VSB 3. Keyboard power (3-pin KBPWR1) This jumper allows you to enable or disable the keyboard wake-up feature. Set this jumper to pins 2-3 (+5VSB) if you wish to wake up the computer when you press a key on the keyboard (the default value is [Disabled]). This feature requires an ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in the BIOS (see section 2.5.1 Power Up Control). P4P800S SE ® KBPWR1 12 23 +5V (Default) +5VSB P4P800S SE Keyboard Power Setting 1-18 Chapter 1: Product introduction