Asus P4SE/U2 - Manual (Page 29)

ASUS P4SE Motherboard 1-19
10. ASUS EZ Plug™ and ATX power connectors
(20-pin ATXPWR, 4-pin ATX+12V, 4-pin AUX+12V)
These connectors connect to an ATX 12V power supply. The plugs
from the power supply are designed to fit these connectors in only one
orientation. Find the proper orientation and push down firmly until the
connectors completely fit.
In addition to the 20-pin ATXPWR connector, this motherboard
requires that you connect the 4-pin ATX +12V power plug to provide
sufficient power to the CPU.
If you are using a standard ATX power supply that does not have the
added ATX +12V plug, then simply connect one of the 4-pin device
power plugs into the ASUS EZ Plug™ connector labeled AUX12V.
P4SE
®
P4SE ATX & Auxiliary Power Connectors
ATXPWR1
ATX12V1
AUX12V1
+12V GND +5V GND
Pin 1
+3.3VDC -12.0VDC COM PS_ON# COM COM COM -5.0VDC +5.0VDC +5.0VDC
PWR_OK +12.0VDC
+3.3VDC +3.3VDC
COM
+5.0VDC
COM
+5.0VDC
COM
+5VSB
+12V DC COM
+12V DC COM
Pin 1
Make sure that your ATX 12V power supply can provide 8A on the
+12V lead and at least 1A on the +5V standby lead (+5VSB). The
minimum recommended wattage is 230W, or 300W for a fully
configured system. The system may become unstable and may
experience difficulty powering up if the power supply is inadequate.