Asus P3-PH4C User Manual - Page 43
power supply in reduced power mode.
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2. USB device wake-up (3-pin USBPW12, USBPW56) 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 USBPW12 jumper is for the rear USB ports (USB port 1-4). The USBPW56 jumper is for the internal USB connectors (USB port 5-8) that you can connect to additional USB ports. USBPW12 R 12 23 USB Device Wake Up +5V (Default) +5VSB USBPW56 12 23 +5V (Default) +5VSB • 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. 4- Chapter 4: Motherboard info