2.ATX power connectors (24-pin EATXPWR, 8-pin ATX12V)

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.

EATX12V EATXPWR

CDCDCDCD

++++ V21 V21 V21 V21

DNDNDNDN

GGGG

Q87M-E

PIN

+3

Volts

+12

Volts

+12

Volts

+5V Standby

Power OK

1

GND

+5

Volts

 

GND

+5

Volts

 

GND

+3

Volts

+3

Volts

PIN 1

GND

+5 Volts

+5 Volts

+5 Volts

-5 Volts

GND

GND

GND PSON#

GND

-12 Volts

+3 Volts

Q87M-E ATX power connectors

•We recommend that you use an ATX 12V Specification 2.0‑compliant power supply

unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power plugs.

•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 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.

3.Speaker connector (4-pin SPEAKER)

The 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you hear system beeps and warnings.

Q87M-E

SPEAKER

+5V GND GND Speaker Out

PIN 1

Q87M-E Speaker Out connector

1-14

Chapter 1: Product introduction