Asus M3A78-CM - Motherboard - Micro ATX Specifications download pdf (Page 31)

3. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

These connectors are for an ATX power supply. The plugs from the power supply are

designed to t these connectors in only one orientation. Find the proper orientation and

push down rmly until the connectors completely t.

•

We recommend that you use an ATX 12 V Specication 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 conguring a

system with more power-consuming devices or when you intend to install additional

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.

4. Serial port connector (10-1 pin COM1)

The connector is for a serial (COM) port. Connect the serial port module cable to the

connector, then install the module to a slot opening at the back of the system chassis.

The serial port bracket (COM1) is purchased separately.

Chapter 1: Product introduction 1-21

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Asus M3A78-CM - Motherboard - Micro ATX Specifications Page 31