10.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.

EATX12V

 

EATXPWR

GND

+12V DC

+3 Volts

GND

GND

+12V DC

+12

Volts

+5 Volts

GND

+12V DC

+12

Volts

+5 Volts

GND

+12V DC

+5V Standby

+5 Volts

PIN 1

 

Power OK

-5 Volts

 

 

 

GND

GND

CROSSHAIR II FORMULA

 

+5 Volts

GND

 

 

GND

GND

 

 

 

 

 

+5 Volts

PSON#

 

 

 

GND

GND

 

 

+3

Volts

-12 Volts

 

 

+3

Volts

+3 Volts

PIN 1

CROSSHAIR II FORMULA ATX power connectors

• Make sure to remove the cap on the EATX12V connector before connecting an 8-pin EPS +12V power plug.

•Use only an 8-pin EPS +12V power plug for the EATX12V connector.

• 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 400 W.

•Do not forget to connect the 4-pin/8pin EATX12V power plug; otherwise, the system will not boot.

•Use of a PSU with a higher power output is recommended 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.

•If you want to use two or more high-end PCI Express x16 cards, use a PSU with 1000 W power or above to ensure the system stability.

•If you want to use 3-Way SLI™ configuration, visit the NVIDIA website (www.nvidia.com) for the qualified PSU vendor list.

ASUS Crosshair II Formula

2-35