User guide

ASUS PCH-DR motherboard 2-29
8. SSI power connectors (24-pin ATXPWR1, 8-pin ATX12V1)
These connectors connect to an SSI-type 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 24-pin power connector, this motherboard requires
that you connect the 8-pin +12V power plug to provide sufficient power
to the CPU.
1. Do not forget to connect the 8-pin +12V power plug. Otherwise, the
system does not boot up.
2. Make sure that your 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 300W. The system may
become unstable or may not boot up if the power is inadequate.
9. Parallel port connector (26-pin LPT1)
This connector is for a parallel printer. Connect a parallel cable
interface (female plug) to this connector, the external port to the printer.
PCH-DR
PCH-DR Parallel Port Connector
LPT1
SPD7GND SPD6GND SPD5GND SPD4GND SLCT PEGND BUSY ACK#GND SPD3GND SPD2SLIN# SPD1PINIT# SPD0ERROR# STB#AFD#
GND
Pin 1
PCH-DR
PCH-DR Power Connectors
For Power Supply
with 20-pin
Power Connector
24-pin Power Connector
GND+12V CPU
GND+12V CPU
GND+12V CPU
GND+12V CPU
8-pin
+3 Volts +3 Volts Ground +5 Volts +5 Volts Ground Ground Power OK +5V Standby +12 Volts
-5 Volts
+5 Volts +3 Volts
-12 Volts
Ground Ground Ground
PSON#
Ground
+5 Volts
+12 Volts +3 Volts
+5 Volts
1
Ground