Intel D925XHY D925XHY Technical Product Specification - Page 55

Power Supply Connectors, INTEGRATOR'S NOTE

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Technical Reference 2.8.2.1 Power Supply Connectors The board has three power supply connectors: • Main power - a 2 x 12 connector. This connector is compatible with 2 x 10 connectors previously used on Intel Desktop boards. The board supports the use of ATX12V power supplies with either 2 x 10 or 2 x 12 main power cables. When using a power supply with a 2 x 10 main power cable, attach that cable on the rightmost pins of the main power connector, leaving pins 11, 12, 23, and 24 unconnected. • ATX12V power - a 2 x 2 connector. This connector provides power directly to the processor voltage regulator and must always be used. Failure to do so will prevent the board from booting. • Alternate power - a 1 x 4 connector. This connector provides additional power when using high wattage PCI Express x16 graphics cards. # INTEGRATOR'S NOTE When using high wattage PCI Express x16 graphics cards, use one of the following power supply configurations to avoid system instability: • The preferred method of power delivery is to use a power supply with a 2 x 12 main power cable. In this configuration, use two connectors to provide power to the board: ⎯ The main power connector ⎯ The ATX12V connector In this configuration, the alternate power connector is not required. The 2 x 12 main power cable can provide up to 144 W of power from the +12 V rail. • An alternate method of power delivery is to use a power supply has a 2 x 10 main power cable. In this configuration, use three connectors to provide power to the board: ⎯ The main power connector ⎯ The ATX12V connector ⎯ The alternate power connector The combination of the 2 x 10 main power cable and the alternate power cable can provide up to 144 W of power from the +12 V rail (72 W each). 55

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Technical Reference
55
2.8.2.1
Power Supply Connectors
The board has three power supply connectors:
•
Main power
– a 2 x 12 connector.
This connector is compatible with 2 x 10 connectors
previously used on Intel Desktop boards.
The board supports the use of ATX12V power
supplies with either 2 x 10 or 2 x 12 main power cables.
When using a power supply with a
2 x 10 main power cable, attach that cable on the rightmost pins of the main power connector,
leaving pins 11, 12, 23, and 24 unconnected.
•
ATX12V power
– a 2 x 2 connector.
This connector provides power directly to the processor
voltage regulator and must always be used. Failure to do so will prevent the board from
booting.
•
Alternate power
– a 1 x 4 connector.
This connector provides additional power when using
high wattage PCI Express x16 graphics cards.
INTEGRATOR’S NOTE
When using high wattage PCI Express x16 graphics cards, use one of the following power supply
configurations to avoid system instability:
•
The preferred method of power delivery is to use a power supply with a 2 x 12 main power
cable.
In this configuration, use two connectors to provide power to the board:
⎯
The main power connector
⎯
The ATX12V connector
In this configuration, the alternate power connector is not required.
The 2 x 12 main power
cable can provide up to 144 W of power from the +12 V rail.
•
An alternate method of power delivery is to use a power supply has a 2 x 10 main power cable.
In this configuration, use three connectors to provide power to the board:
⎯
The main power connector
⎯
The ATX12V connector
⎯
The alternate power connector
The combination of the 2 x 10 main power cable and the alternate power cable can provide up
to 144 W of power from the +12 V rail (72 W each).