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2-8
Connecting Cables
Power Connectors
A 24-pin main power supply connector(JPW1), and
two 8-pin CPU power connectors (JPW2/JPW3)
are located on the motherboard. These power
connectors meet the SSI EPS 12V specification.
These power connectors must be connected to
your power supply to provide adequate power to
your system. See the table on the right for pin
definitions.
BMC
JSD1
JBT1
BIOS
Intel
PCH
LAN1 USB2/3 USB0/1
LAN2
UID
LED3
LAN
i350 (-CF31)
X540 (-CTF31)
CLOSE 1st
CPU2
JBAT1
BAR CODE
CLOSE 1st
CPU1
OPEN 1st
2-29
Chapter 2: Installation
ATX Power 24-pin Connector
Pin# Definition Pin #
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
12V 8-pin PWR Con-
Pin Definitions
Pins
1 through 4
5 through 8
(Required)
A. JPW1: 24-pin ATX
VGA
PWR (Req'd)
COM1
IPMI_LAN
B. JPW2: 8-pin Processor
PWR (Req'd)
C. JPW3: 8-pin Proces-
sor PWR
OPEN 1st
X9DRW-CF31
Rev. 1.01
C
B
A
FAN1
Pin Definitions
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
nector
Definition
Ground
+12V
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