Power Supply Units; Thermal Design - Dell PowerEdge R920 Technical Manual

Feature
Active power management
Fresh Air cooling
Rack infrastructure
Power supply units
Energy Smart power supplies have intelligent features, such as the ability to dynamically optimize
efficiency while maintaining availability and redundancy. Also featured are enhanced
power‐consumption reduction technologies, such as high‐efficiency power conversion and
advanced thermal‐management techniques, and embedded power‐management features,
including high‐accuracy power monitoring.
There are four power supply units available for the PowerEdge R920: which have auto
sensing and auto switching capability:
750W AC Platinum
750W AC Titanium
1100W AC Platinum

1100W DC
Thermal design
The thermal design of the PowerEdge R920 reflects the following:
Multiple sensors are monitored for thermal feedback control : The PowerEdge R920
dynamically controls system cooling fan speed based on responses from all component
temperature sensors, including processors, hard disk drives, DIMMs, storage cards and the
inlet ambient temperature. Thermal management adjusts cooling according to what the
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Dell PowerEdge Technical Guide
Description
Intel Node Manager is an embedded technology that provides individual
server‐level power reporting and power limiting functionality. Dell offers a
complete power management solution comprised of Intel Node Manager
accessed through Dell iDRAC7 Enterprise and OpenManage Power Center
that allows policy‐based management of power and thermals at the
individual server, rack and data center level.
Hot spare reduces power consumption of redundant power supplies.
Thermal control of fan speed optimizes the thermal settings for your
environment to reduce fan consumption and lower system power
consumption.
Idle power enables Dell servers to run as efficiently when idle as when at full
workload.
With the thermal design and reliability of Dell products, certain
configurations have the capability to operate at excursion‐based
temperatures beyond the industry standard of 35°C (95°F) up to 45°C (113°F)
for excursionary periods of time and up to a 26°C dew point at 90% relative
humidity; without impacting your availability model. Find additional
information at Dell.com/FreshAir.
Dell offers some of the industry's highest‐efficiency power infrastructure
solutions, including:

Power distribution units

Uninterruptible power supplies

Energy Smart containment rack enclosures
Find additional information at content.dell.com/us/en/enterprise/
power‐and‐cooling‐technologies‐components‐rack‐infrastructure.aspx.
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