Asus P8Q77-M2 - Manual (Page 34)

1-22 Chapter 1: Product introduction
• For a fully configured system, we recommend that you use a power supply unit
(PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a
minimum power of 350 W.
• DO NOT forget to connect the 4-pin / 8-pin ATX +12V power plug. Otherwise, the
system will not boot up.
• We recommend that you use a PSU with higher power output when configuring a
system with more power-consuming devices. The system may become unstable or
may not boot up if the power is inadequate.
• If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
2. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)
These connectors are for ATX power supply plugs. The power supply plugs are
designed to fit these connectors in only one orientation. Find the proper orientation and
push down firmly until the connectors completely fit.
P8Q77-M2
P8Q77-M2 ATX power connectors
EATXPWR
PIN 1
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts +3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
EATX12V
+12V DC
+12V DC
+12V DC
+12V DC GND
GND
GND
GND
3. Direct connector (2-pin DRCT)
This connector is for the chassis-mounted button that supports the DirectKey function.
Connect the button cable that supports DirectKey, from the chassis to this connector on
the motherboard.
Ensure that your chassis comes with the button cable that supports the DirectKey feature.
Refer to the technical documentation that came with the chassis for details.
P8Q77-M2
P8Q77-M2 DRCT connector