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Dell
5
Power, Thermal, Acoustic
4B
5.1
Power Subsystem
41B
The power supply subsystem supports up to two AC-DC power supplies (1+1 redundant configuration)
connected directly to the planar. The power supply only provides +12V and +12Vaux. There are
several voltage regulators in the system to supply different voltage levels needed by different logic
devices.
5.1.1
Power Distribution Board
111B
The Power Distribution Board (PDB) distributes power from the Power Supply Unit (PSU) to the CPU
and IO planars. The Power Management bus enables power supply monitoring and load balancing. The
CPU planar connects directly to the PDB through a 32-pin + 6-blade connector. The IO planar
connects to the PDB through a 12-conductor (2x6) cable. The standby power is routed through the
CPU planar and IO planar via Air-max connector.
5.2
Power Efficiency
42B
One of the main features of the 11G family of servers is enhanced power efficiency. R810 achieves
higher power efficiency by implementing the following features:
User-selectable power cap (subsystems will throttle to maintain the specified power cap)
Improved power budgeting
Accurate inlet temperature
PSU/VR efficiency improvements
Switching regulators instead of linear regulators
Closed loop thermal throttling
Increased rear venting/3D venting
PWM fans with an increased number of fan zones and configuration-dependent fan speeds
Use of DDR3 memory (lower voltage compared to DDR2, UDIMM support)
CPU VR dynamic phase shedding
Memory VR static phase shedding
Random time interval for system start (Allows an entire rack to power on without exceeding
the available power)
BIOS Power/Performance options page
Active Power Controller (BIOS-based CPU P-state manager)
Ability to power down or throttle memory
Ability to disable a CPU core
Ability to turn off embedded NICs or PCI-e lanes when not being used
Option to run PCI-e at Gen1 speeds instead of Gen2
Dell PowerEdge R810 Technical Guide
20
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