Intel BLKD915GAV Product Specification - Page 72
Power Supply Connectors, INTEGRATOR'S NOTE
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification 2.8.2.2 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 Table 31. Main Power Connector Pin Signal Name 1 +3.3 V 2 +3.3 V 3 Ground 4 +5 V 5 Ground 6 +5 V 7 Ground 8 PWRGD (Power Good) 9 +5 V (Standby) 10 +12 V 11 +12 V (Note) 12 2 x 12 connector detect (Note) Pin Signal Name 13 +3.3 V 14 -12 V 15 Ground 16 PS-ON# (power supply remote on/off) 17 Ground 18 Ground 19 Ground 20 No connect 21 +5 V 22 +5 V 23 +5 V (Note) 24 Ground (Note) Note: When using a 2 x 10 power supply cable, this pin will be unconnected. 72