Asus P4S-X - Manual (Page 27)

ASUS P4S-X motherboard user guide 1-17
3. COM2 connector (10-1 pin COM2)
This connector accommodates a serial port using an optional serial port
bracket. Connect the bracket cable to this connector then install the bracket
into a slot opening at the back of the system chassis.
4. ATX power connectors (20-pin ATXPWR1, 4-pin ATX12V1)
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 ATXPWR1 connector, this motherboard requires that
you connect the 4-pin ATX +12V power plug to provide sufficient power to the
CPU.
Make sure that your ATX 12V power supply can provide 8A on the +12V lead
and at least 1A on the +5-volt 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.
P4S-X
®
P4S-X Serial COM2 Bracket
PIN 1
COM2
P4S-X
®
P4S-X ATX Power Connectors
ATX12V1
ATXPWR1
+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
The COM2 module is purchased separately.