Asus Crosshair II Formula - Republic of Gamers Series Motherboard User Manual page 61

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.
CROSSHAIR II FORMULA
®
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 �ATX12V 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
GND
GND
GND
GND
RESET
EATX12V
+12V DC
+3 Volts
+12V DC
+12 Volts
+12V DC
+12 Volts
+12V DC
+5V Standby
Power OK
PIN 1
+5 Volts
+5 Volts
+3 Volts
+3 Volts
EATXPWR
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND GND
GND
GND GND
PSON#
GND GND
-12 Volts
+3 Volts
PIN 1
2-35