Processor Core Power Connector; Power Supply Connectors; Main Power Connector - Intel DH77EB Specification

2.2.2.2 Add-in Card Connectors
The board has the following add-in card connectors:
One PCI Express x16 (3.0/2.x/1.x)
•
• Three PCI Express x1 (2.x/1.x)
One PCI Express Full-/Half-Mini Card (with support for mSATA)
•
NOTE
PCI Express 3.0 is only supported by 3
processors.
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 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 29. Processor Core Power Connector
Pin Signal Name
1 Ground
3 +12 V
Table 30. 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
(Note)
11
+12 V
12
2 x 12 connector detect
Note: When using a 2 x 10 power supply cable, this pin will be unconnected.
rd
generation Intel Core processor family
Pin Signal Name
2 Ground
4 +12 V
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
Technical Reference
(Note)
(Note)
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