196 Installing System Components
Power Sled NOTE: This section applies to PowerEdge C8000 server enclosure with internal
power source.
Enclosure Power Guidelines
Observe the following guidelines when connecting power to the enclosure:
• Always connect the enclosure’s AC power sockets to a single power source,
switch, or PDU.
• Make sure to install the power sleds and connect power to the enclosure
before you install any other sled.
Power Sled Installation Guidelines
Follow these guidelines when installing power sleds.
• If a power supply is removed from the enclosure and the power supply
number in the enclosure is less than the required number of power
supplies, all sleds in the enclosure will be throttled until the failed PSU
module is replaced. For example, in a 2+2 PSU configuration, if three PSU
modules fail, it would trigger the sleds in the enclosure to throttle. When
the failed PSU modules are replaced the enclosure exits power throttling
mode and resume operating normally.
NOTE: Throttling reduces power consumption of the sled modules by changing the
processor duty cycle, thereby reducing sled performance. When a throttling event
occurs the event is logged in the System Event Log (SEL). See the Using the
Baseboard Management Controller Guide at dell.com/support/manuals for more
information.
• The following table lists the supported configuration where power supply
redundancy is guaranteed.
NOTE: Configurations higher than indicated in the table may change the power
supply mode to non-redundant. In non-redundant mode, if the power requirement
exceeds the installed system power capacity, BIOS will throttle the processors. If
CPU power capping is enabled, throttling can occur on processors that exceed the
cap value. See "Power Management" on page78 for more information.