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