Supermicro H12DSG-O-CPU User Manual page 41

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.
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to the header to inform you when the chassis is opened.
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
Fan Header
Pin Definitions
Pin# Definition
1 Ground (Black)
2 +12V (Red)
3 Tachometer (Yellow)
4 PWM control (Blue)
Chassis Intrusion
Pin Definitions
Pin# Definition
1 Intrusion Input+
2 Intrusion Input-
C connection on your system.
2
IPMB Header
Pin Definitions
Pin# Definition
1 Data
2 Ground
3 Clock
4 No Connection
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Chapter 2: Installation