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Chapter 4: Motherboard Connections
Power LED/Speaker
JD1 is used to connect an extra speaker. By default, pins 3-4 are closed with a cap to enable
the onboard buzzer at SP1. To use an extra speaker instead, connect the speaker connector
to pins 1-4. Refer to the table below for pin definitions.
Speaker/Onboard Buzzer Header
Pin Definitions
Pin#
Signal
1
P5V
2
Key
3
R_SPKPIN_N
4
R_SPKPIN
Power SMB (I
2
C) Header
The Power System Management Bus (I
2
C) connector (JPI
2
C1) monitors the power supply,
fan, and system temperatures. Refer to the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PMBUS_Alert
4
Ground
5
+3.3V
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to inform you of a chassis intrusion when the chassis is opened. Refer to
the table below for pin definitions.
Chassis Intrusion
Pin Definitions
Pin#
Definition
1
Intrusion Input
2
Ground
NVMe I²C Header
Connector JNVI²C1 is a management header for the Supermicro AOC NVMe PCIe peripheral
cards. Connect the I²C cable to this connector.
Note:
When installing an NVMe device on the motherboard, connect the first NVMe port
(JNVI²C1) first for your system to work properly.
