Dell External OEMR R910 Technical Manual

Also see for PowerEdge R910: Manual Update Update Hardware owner's manual Update

Contents

Dell External OEMR R910 Technical Manual Manual pdf 31 page image

DellDell PowerEdge R910 Technical Guide 31Table 4. Power Supply SpecificationsAC Power supply (per power supply)Wattage 1100 W (High Output PSU)750 W (Energy Smart PSU)Voltage 90–264 V, 47–63 Hz, auto-rangingHeat dissipation 8407 BTU/hr maximum (with two or four1100 W PSUs)5732 BTU/hr maximum (with two or four750W PSUs)Maximum inrush current Under typical line conditions and over theentire system ambient operating range, theinrush current may reach 55 A per powersupply for 10 ms or less6.2 Environmental SpecificationsAirborne Contaminant Level: Class G2 or lower as defined by ISA-S71.04-1985For additional information about environmental measurements for specific system configurations, seeProduct Safety, EMC, and Environmental Datasheets on Dell.com.6.3 ThermalThe R910 thermal solution includes: Optimized airflow impedance for optimum cooling efficiency Custom air baffling directs airflow through the components to maintain proper cooling Custom designed heat sinks maintain CPU, IOH, and Mill Brook chip temperatures withinthermal design targets Highly Optimized Fan Control Algorithmo Base fan speeds are a function of hardware configuration and ambient temperature tominimize airflow for a given environment.o PID control algorithms are used for both CPU and DIMMs to maintain appropriatethermal margino Double refresh switching allows for DIMM temperature excursions up to 95°C whilemaintaining performance and thermal design targets The R910 thermal algorithm monitors the thermal sensor on each DIMM to maintainDIMM temperatures below the typical 85°C specification in normal operatingconditions. Under extreme operating conditions the thermal algorithm can switch the DIMMsinto Double Refresh mode allowing an additional 10°C of thermal headroom. InDouble Refresh mode DIMMs are allowed to operate as high as 95°C.