Headers And Connectors - Supermicro SuperServer SYS-421GU-TNXR User Manual

4.2 Headers and Connectors

Power Connectors
Two main power connectors are connected to busbars from the power distribution board in
the system. Four 4-pin power connectors (JRSC_PWR1–JRSC_PWR4) are used for riser
cards. Another two 4-pin power connectors (JAIOM_PWR1 and JAIOM_PWR2) provide
additional power for Advanced I/O modules. All these power connectors meet the ATX SSI
EPS 12V specification and must be connected to your power supply to provide adequate
power to your system.
Important: To provide adequate power to your system, be sure to connect the main power
supplies and all 4-pin PWR connectors to the power supply. Failure to do so may void the
manufacturer warranty on your power supply and motherboard.
Standby Power Connectors
Two 4-pin 12V standby power connectors are located at JPDB_P12V_STBY and JPWR6
Fan Headers
There are ten 4-pin fan headers (FAN1A/1B/2A/2B/3A/3B/4A/4B/5A/5B).
are used for the cooling fans for your system.
by Thermal Management using the BMC 2.0 interface.
Chapter 4: Motherboard Connections
12V 4-pin Power
Pin Definitions
Pin# Definition
1 - 2 Ground
3 - 4 +12V
Fan speed control for these fans is supported
Fan Header
Pin Definitions
Pin# Definition
1 Ground (Black)
2 +12V (Red)
3 Tachometer
4 PWM Control
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These fan headers