Intel DZ77RE-75K Technical Product Specification - Page 57

Power Supply Connectors

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Technical Reference 2.2.2.3 Power 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 to the main power connector, leaving pins 11, 12, 23, and 24 unconnected. • Processor core power - a 2 x 4 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 25. Processor Core Power Connector Pin Signal Name Pin Signal Name 1 Ground 2 +12 V 3 Ground 4 +12 V 5 Ground 6 +12 V 7 Ground 8 +12 V Table 26. Main Power Connector Pin Signal Name 1 +3.3 V Pin Signal Name 13 +3.3 V 2 +3.3 V 14 -12 V 3 Ground 15 Ground 4 +5 V 16 PS-ON# (power supply remote on/off) 5 Ground 17 Ground 6 +5 V 18 Ground 7 Ground 8 PWRGD (Power Good) 19 Ground 20 No connect 9 +5 V (Standby) 21 +5 V 10 +12 V 11 +12 V (Note) 12 2 x 12 connector detect (Note) 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 Power supply considerations Refer to Section 2.5.1 on page 64 57

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Technical Reference
57
2.2.2.3
Power 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 to the main
power connector, leaving pins 11, 12, 23, and 24 unconnected.
•
Processor core power
– a 2 x 4 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 25.
Processor Core Power Connector
Pin
Signal Name
Pin
Signal Name
1
Ground
2
+12 V
3
Ground
4
+12 V
5
Ground
6
+12 V
7
Ground
8
+12 V
Table 26.
Main Power Connector
Pin
Signal Name
Pin
Signal Name
1
+3.3 V
13
+3.3 V
2
+3.3 V
14
-12 V
3
Ground
15
Ground
4
+5 V
16
PS-ON# (power supply remote on/off)
5
Ground
17
Ground
6
+5 V
18
Ground
7
Ground
19
Ground
8
PWRGD (Power Good)
20
No connect
9
+5 V (Standby)
21
+5 V
10
+12 V
22
+5 V
11
+12 V
(Note)
23
+5 V
(Note)
12
2 x 12 connector detect
(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 on page 64