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Chapter 4: Motherboard Connections
4.2 Headers and Connectors
Fan Headers
There are eight fan headers on the motherboard. These are 4-pin fan headers; pins 1-3
are backward compatible with traditional 3-pin fans. The onboard fan speeds are controlled
by Thermal Management (via Hardware Monitoring) in the BIOS. When using Thermal
Management setting, please use all 3-pin fans or all 4-pin fans.
Required Connection
+12V 8-pin Power
Pin Definitions
Pin#
Definition
1 - 4 Ground
5 - 8 +12V
Secondary Power Connector
JPWR2 must also be connected to the power supply. This connector is used to power the
processor(s).
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
4
PWM Control
Trusted Platform Module/Port 80 Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
+3.3V
2
SPI_CS#
3
RESET#
4
SPI_MISO
5
SPI_CLK
6
GND
7
SPI_MOSI
8
9
+3.3V Stdby
10
SPI_IRQ#
TPM Header
The JTPM1 header is used to connect a Trusted Platform Module (TPM)/Port 80, which is
available from a third-party vendor. A TPM/Port 80 connector is a security device that supports
encryption and authentication in hard drives. It allows the motherboard to deny access if the
TPM associated with the hard drive is not installed in the system. See the table below for
pin definitions.
