67
Chapter 4: Motherboard Connections
4.2 Headers and Connectors
Fan Headers
There are eight 4-pin fan headers (FAN1~FAN8) and two 9-pin fan headers for liquid cooling
pumps (FANA/FANB). Fan speed control is available for 4-pin fans by Thermal Management
via the BMC interface. Refer to the tables below for pin definitions.
VROC RAID Key Header
A VROC RAID Key header is located at JRK1 on the motherboard. For NVMe RAID support,
install a VROC RAID Key on JRK1 as shown in the illustration below.
Intel VROC Key
Pin Definitions
Pin#
Definition
1
Ground
2
3.3V Standby
3
Ground
4
PCH RAID Key
VROC Key
VROC Key Header (JRK1)
Note:
The graphics contained in this user's manual are for illustration purposes only.
The components installed in your system may or may not look exactly the same as
the graphics shown in the manual.
4-Pin Fan Header
Pin Definitions
Pin#
Definition
1
Ground
2
2.5A/+12V
3
Tachometer
4
PWM_Control
9-Pin Fan Header
Pin Definitions
Pin#
Definition
1
Ground
2
P12V
3
FAN_IN
4
PWM_Control
5
PRSNT
6
P3V3_SB
7
I2C_CLK
8
I2C_DAT
9
Ground
