Intel® Server Board S5500HV/Intel® Server System SR1670HV TPS
Platform Management
27
Intel Confidential
Revision 1.2
Intel order number E69391-006
4.1
System Fan Control
The server board provides four 4-pin system fan connectors.
Figure 17. System Fan Connector Locations
Each system fan connector has the following pin-out definition:
Figure 18. System Fan Connector Pin-out Definition
The fan speed for all the system fans is controlled by a single pulse width modulator (PWM) and
monitored by the BMC. BIOS setup provides two fan speed options:
Full Speed Mode
&
High
Density Mode
.
In
Full Speed Mode
, system fans will only operate at highest fan speed, providing maximum air
flow.
In
High Density Mode
, fan speed is controlled, allowing for a quieter system. At nominal CPU
temperatures, the fan speeds will operate at 50% of maximum. As CPU temperatures rise, the
fan speeds will gradually increase to a maximum 100%. As CPU temperatures fall, fan speeds
will automatically readjust to a lower speed.
4.2
On-board/System Sensor Information
The server board includes many on-board sensors which are monitored by the BMC for various
server management functions.
FAN 2
FAN 1
FAN 3
FAN 4
Pin 1 – GND
Pin 2 – Fan Power
Pin 3 – Fan Speed
Pin 4 – PWM Control
Connector
Key
