Cooling Subsystem; Airflow Paths - Intel SR2612UR Product Specification

Intel® Server System SR2612UR TPS
4.

Cooling Subsystem

Several components and configuration requirements make up the cooling subsystem of the
system. These include the system fan module, power supply fans, CPU air duct, and drive bay
population. All are necessary to provide and regulate the airflow and air pressure needed to
maintain the system's thermals when operating at or below the maximum specified thermal
limits.
The system uses four non-redundant fans providing sufficient airflow to maintain internal
system thermal requirements when the external ambient temperature remains within specified
limits.
The system uses a variable fan speed control engine to provide adequate cooling for the
system at various ambient temperature conditions, under various server workloads, and with
the least amount of acoustic noise possible. To minimize acoustics, the fans operate at the
lowest speed for any given condition.
The Integrated Baseboard Management Controller (Integrated BMC) on the Intel
S5520UR is used for the variable fan speed control function. The Integrated BMC monitors
selective component temperatures, the ambient temperature, and each fan's RPM to determine
the necessary airflow. The Integrated BMC sets the fan speeds to the appropriate RPM to
maintain proper cooling. The Integrated BMC also logs errors into the System Event Log (SEL)
when temperature sensors exceed their safe operating ranges, or if any of the fans fail to
operate at safe airflow speeds.
If a fan fails, the Integrated BMC boosts the remaining fans to compensate for the lost airflow. If
the cooling is not sufficient under a failed fan condition, the system eventually shuts down to
protect its primary components from thermal damage.
4.1

Airflow paths

The airflow in the system is divided into three zones:

Zone 1 is the CPU and Memory cooling zone.

Zone 2 is the PCI cooling zone.

Zone 3 is the power supply cooling zone.
The disk drives located in the front of the shelves are cooled by a combination of all three zones.
Revision 1.3
Intel order number E76293-003
Cooling Subsystem
®
Server Board
27