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5-8
Connector Definitions
EPS 12V Power Connector
There are two 24-pin main power sup-
ply connectors on the serverboard.
These power connectors meet the
SSI EPS 12V specification. See the
table on the right for pin definitions.
(Only one of the two connections
need to be made.)
Processor Power
Connectors
In addition to the primary power con-
nectors, a 4-pin EPS 12V/15A power
connector (from your power supply)
must be connected to each CPU
power pod (VRM). Refer to the table
on the right for pin definitions.
Power Fail LED
The Power Fail LED connection is
located on pins 5 and 6 of U66. Refer
to the table on the right for pin defi-
nitions.
NMI Button
The non-maskable interrupt button
header is located on pins 19 and 20
of U66. Refer to the table on the
right for pin definitions.
Power LED
The Power LED connection is lo-
cated on pins 15 and 16 of U66. Re-
fer to the table on the right for pin
definitions.
Chapter 5: Advanced Serverboard Setup
12V, 24-pin Power Supply Connector Pin
Definitions (J20, J36)
Pin Number Definition
13
+3.3V
14
-12V
15
COM
16
PS_ON#
17
COM
18
COM
19
COM
20
Res(NC)
21
+5V
22
+5V
23
+5V
24
COM
4-Pin, 12v Power Supply
Power Fail LED Pin
Number
Definitions (U66)
Pin
Number
19
20
PWR_LED Pin Definitions
Pin
Number
15
16
5-17
Pin Number Definition
1
+3.3V
2
+3.3V
3
COM
4
+5V
5
COM
6
+5V
7
COM
8
PWR_OK
9
5VSB
10
+12V
11
+12V
12
+3.3V
Connectors
(to power pods)
Pins
Definition
1 thru 2
Ground
3 thru 4
+12v
Definitions
(U66)
Pin
Definition
5
Vcc
6
GND
NMI Button Pin
Definition
Control
Ground
(U66)
Definition
Vcc
Control
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