Supermicro AS-4124GS-TNR - Page 53

53
Chapter 4: Motherboard Connections
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
Fan Mode in the BMC. When using Fan Mode setting, please use all 4-pin fans.
Fan Header
Pin Denitions
Pin# Denition
1 Ground (Black)
2 +12V (Red)
3 Tachometer (Yellow)
4 PWM control (Blue)
IPMB System Management Bus Header
A System Management Bus header for IPMI 2.0 is located at JIPMB1. Connect the appropriate
cable here to use the IPMB I
2
C connection on your system.
IPMB Header
Pin Denitions
Pin# Denition
1 Data
2 Ground
3 Clock
4 No Connection