Intel DG33BU Power Supply Connectors, Processor Core Power Connector, Main Power Connector

Intel Desktop Board DG33BU Technical Product Specification

2.2.2.4Power Supply Connectors

The board has the following 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.

•Processor core 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.

Table 18. Processor Core Power Connector

Pin	Signal Name
1	Ground
3	+12 V

Pin	Signal Name
2	Ground
4	+12 V

Table 19. 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.

For information about	Refer to
Power supply considerations	Section 2.5.1, page 52

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