Headers And Connectors - Supermicro SuperServer 620BT-HNTR User Manual

4.2 Headers and Connectors

Fan Headers
There are four 4-pin fan headers on the motherboard: two (FAN3~FAN4) on the front plane
(see locations below), and two (FAN1~FAN2) on the HDD backplane. All these 4-pin fan
headers are backwards compatible with the traditional 3-pin fans. However, fan speed control
is available for 4-pin fans only by Thermal Management via the BMC interface. Refer to the
table below for pin definitions.
VROC RAID Key Header
A VROC RAID Key header is located at JRK1 on the motherboard. Install a VROC RAID
Key on JRK1 for NVMe RAID support as shown in the illustration below. Please refer to the
layout below for the location of JRK1.
Intel VROC Key
Pin Definitions
Pin# Definition
1 Ground
2 3.3V Standby
3 Ground
4 PCH RAID Key
Note: The graphics contained in this user's manual are for illustration only. The components
installed in your system may or may not look exactly the same as the graphics shown in the
manual.
Chapter 4: Motherboard Connections
Fan Header
Pin Definitions
Pin# Definition
1 Ground
2 2.5A/+12V
3 Tachometer
4 PWM_Control
67
VROC Key
VROC Key Header (JRK1)