Air Flow Support; Power Supply Zone; Full Height Riser Zone; Cpu / Memory / Low Profile Pci Zone - Intel SR2400 Technical Product Specification

Cooling Subsystem
3.3

Air Flow Support

To control airflow within the system, the Server Chassis SR2400 uses a combination air baffle
and CPU Air Duct to isolate and direct airflow to three critical areas or zones: the Power Supply
Zone, the Full Height PCI Zone, and the CPU/Memory/Low Profile PCI Zone.
3.3.1

Power Supply Zone

An air baffle is used to isolate the air flow of the main system board zones from the zone directly
behind the power supply. As the power supply fans pull pre-heated air through the power
supply from inside the chassis, the zone behind it must remain as cool as possible by drawing
air from the leftmost drive bays only.
3.3.2

Full Height Riser Zone

The Full Height Riser zone is the area between the power supply and the full height riser card of
the riser assembly. The air flow through this area is generated by FAN4 of the fan module in a
non-redundant fan configuration. In a redundant fan configuration, the air flow for this zone is
provided by FAN4 and FAN8. Air is drawn from the drive bay area through the fan and pushed
out of the system through ventilation holes the back side of the chassis.
3.3.3

CPU / Memory / Low Profile PCI Zone

The CPU / Memory / Low Profile PCI zone is the area between the Low Profile Riser card of the
riser assembly and the right chassis wall. In a non-redundant fan configuration, the air flow for
this zone is generated by system fans FAN1, FAN2, and FAN3 of the fan module. In a
redundant fan configuration, the air flow for this zone is provided by system fans FAN1 and
FAN5, FAN2 and FAN6, and FAN3 and FAN7. Air is drawn from the drive bay area, through the
fans, directed through the CPU Air Duct, and out through ventilation holes on both the back wall
and rear side wall of the chassis.
The CPU Air duct is used to direct air flow through the processor heat sinks for both single and
dual processor configurations. For single processor configurations, a flexible air baffle is
attached to the air duct as shown in the following diagram.
Operating a single processor configuration without the air baffle installed will result in the
processor over heating and may cause the system to shutdown.
28

Figure 18. CPU Air Duct with Air Baffle

Intel order number C78845-001
Intel® Server Chassis SR2400
Revision 1.0