The chassis provides four redundant system fans (40x40x56mm dual rotor fans) and two redundant power supply fans.
Note that the system fans are only redundant when running Low Voltage processors.
The power supply fans are only redundant in the 1+1 power supply configuration.
There is also one additional non-redundant system fan (40x40x28mm single rotor fan) cooling the PCI section. When external ambient temperatures remain within specified limits, the cooling system will provide sufficient air flow for all hot-swap drive, processors, memory, and add-in card configurations.
This applies to: