Dell PowerEdge R715 Technical Manual

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Dell PowerEdge R715 Technical Manual Manual pdf 22 page image

DellPowerEdge R715 Technical Guide 224.2 Power EfficiencyOne of the main features of the 11G family of servers is enhanced power efficiency. The R715achieves 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• Power-supply and VR efficiency improvements• Use of switching regulators instead of linear regulators• Closed-loop thermal throttling• Increased rear venting and 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)• Processor VR dynamic phase shedding• Memory VR static phase shedding• Ability to configure a random time interval for system start after an AC power failure• Ability for an entire rack to power on without exceeding the available power• BIOS Power/Performance options page• Active Power Controller (BIOS-based processor P-state manager)• Ability to power down or throttle memory• Ability to disable a processor 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 Gen24.3 Power Supply Specifications Summary4.3.1 Standard 1100W Power SupplyThe PowerEdge R715 1100W power supply is offered for standard configurations. See the followingtable for specifications.Table 4. Standard 1100W Power Supply SpecificationsAC Power Supply (per power supply)Wattage 1100 (1023, low line)Voltage 90-264 VAC, auto-ranging, 47-63 HzMaximum inrush current Under typical line conditions and over the entire systemambient operating range, the inrush current may reach 55A perpower supply for 10ms or lessThe R715 1100W Power Supply is certified Gold (80 Plus) and Climate Savers 3. It is certified UL approved andincorporates PFC logic.4.3.2 Energy Smart 750W Power SupplyThe PowerEdge R715 Energy Smart 750W power supply is offered for configurations which do notrequire maximum power headroom. See the following table for specifications.