13.ATX power connectors (24-pin ATX-PWRGD, 4-pin ATX12V)

These connectors are for an ATX 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.

M3N78-VM

ATX12V

+12V DC +12V DC GND GND

EATXPWR

+3 Volts Ground

+12 Volts +5 Volts

+12 Volts +5 Volts

+5V Standby +5 Volts

Power OK -5 Volts

Ground Ground

+5 Volts Ground

Ground Ground

+5 Volts PSON#

Ground Ground

+3 Volts -12 Volts

+3 Volts +3 Volts

M3N78-VM ATX Power Connector

•We recommend that you use an ATX 12 V Specification 2.0‑compliant power supply unit (PSU) with a minimum of 300 W power rating. This PSU type has 24-pin and 4-pin power plugs.

•If you intend to use a PSU with 20-pin and 4-pin power plugs, ensure that the 20-pin power plug can provide at least 15 A on +12 V and that the PSU has a minimum power rating of 300 W. The system may become unstable or may not boot up if the power is inadequate.

•Do not forget to connect the 4-pin ATX +12 V 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.

•You must install a PSU with a higher power rating if you intend to install additional devices.

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Chapter 1: Product introduction