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2.7 Connectors
Power Connections
Power Connectors
JPWR1 is the 24-pin power connector for ATX power source. JPWR2 and JPWR3 are the 12V
DC power connectors that provide power to the CPU in conjunction with JPWR1 or they can be
used as the sole 12V DC only power inputs when JPWR1 is not in use.
ATX Power 24-pin Connector
Pin Definitions
Pin#
Definition
13
+3.3V
14
-12V
15
Ground
16
PS_ON
17
Ground
18
Ground
19
Ground
20
Res (NC)
21
+5V
22
+5V
23
+5V
24
Ground
JUIDB1
VGA
MH1
LAN2
BMC
JPFR2
BT1
MH4
M.2 NVME
JBT1
M.2-P
CMOS CLEAR
MAC CODE
MH15
SAN MAC
MH6
BIOS LICENSE
MH9
MH10
FAN6
FAN5
FAN4
FAN3
Pin#
Definition
1
+3.3V
2
+3.3V
3
Ground
4
+5V
5
Ground
6
+5V
7
Ground
8
PWR_OK
9
5VSB
10
+12V
11
+12V
12
+3.3V
COM1
MH2
USB3/4
(3.2 Gen 1)
LAN1
IPMI_LAN
USB0/1
JNCSI1
JTPM
X550
MH17
USB2
PCH
C741
JRK1
JVRM1
CPU
JPI2C
MH8
1
2
3
FAN2
FAN1
MH7
8-pin CPU Power
Pin Definitions
Pin#
Definition
1-4
GND
5-8
12V
1. 24-Pin ATX Power
2. 8-Pin CPU Power
3. 4-Pin CPU Power
45
Chapter 2: Installation
4-pin CPU Power
Pin Definitions
Pin#
Definition
1-2
GND
3-4
12V
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