Dell POWEREDGE R710 Series Technical Manualbook

Also see for POWEREDGE R710: Manual Installation Technical guide Hardware owner's manual User manual

Contents

Dell™ PowerEdge™ R710 Technical Guidebook18h. acousticsThe acoustical design of the PowerEdge R710 reflects the following:• Adherence to Dell’s high sound quality standards. Sound quality is different from sound powerlevel and sound pressure level in that it describes how humans respond to annoyances in sound,like whistles, hums, etc. One of the sound quality metrics in the Dell specification is prominenceratio of a tone, and this is listed in the table below.• Office environment acoustics. Compare the values for LpA in the table below and note thatthey are lower than ambient noise levels of typical office environments.• Hardware configurations affect system noise levels. Dell’s advanced thermal control providesfor optimized cooling with varying hardware configurations. Most typical configurations willperform as listed in the table below. However some less typical configurations and componentscan result in higher noise levels. For example, a system configured with a PERC6/E card will beapproximately twice as loud (~9 dBA higher) in 23+/-2° C ambient.• Noise ramp and descent at Bootup. Fan speeds hence noise levels ramp during the bootprocess in order to add a layer of protection for component cooling in the case that the systemwere not to boot properly.PowerEdge R710 (2.5" and 3.5" chassis) with RK385 fans (quantity below), 2x 870-W FU096 PowerSupplies, 2.40 GHz Quad-Core E5530 CPUs (quantity below), 7x 2-GB DIMMs, 1x DVD Drive, Perc 6icard, and 4x Hard Disk Drives (type below)Acoustical dependence on quantities of fans, CPUs, and Hard Disk Drive type is not strong. The valuesbelow represent therefore the performance for redundant (5x fans and 2x CPUs) as well as thenonredundant (4x fans and 1x CPU) configurations. They also represent performance for 2.5" 10k SASXK112 as well as 3.5" 7.2k SATA NW340 Hard Disk Drives.Condition in 23 +_ 2° C ambient LwA-UL, bels LpA, dBA TonesStandby 3.1 18 No prominent tonesIdle 5.5 39 No prominent tonesActive Hard Disk Drives 5.5 39 No prominent tonesStressed Processor 5.5 39 No prominent tonesDefinitionsStandby: AC Power is connected to Power Supply Units but system is not turned on.Idle: Reference ISO7779 (1999) definition 3.1.7; system is running in its OS but no other specific activity.Active Hard Drives: An operating mode per ISO7779 (1999) definition 3.1.6; Section C.9 of ECMA-749th ed. (2005) is followed in exercising the hard disk drives.Stressed Processor: An operating mode per ISO7779 (1999) definition 3.1.6; SPECPower set to 50%loading is used.LwA-UL: The upper limit sound power level (LwA) calculated per section 4.4.2 of ISO 9296 (1988) andmeasured in accordance with ISO7779 (1999).LpA: The average bystander position A-weighted sound pressure level calculated per section 4.3 ofISO9296 (1988) and measured in accordance with ISO7779 (1999). The system is placed in arack with its bottom at 25-cm from the floor.Tones: Criteria of D.5 and D.8 of ECMA-74 9th ed. (2005) are followed to determine if discrete tones areprominent. The system is placed in a rack with its bottom at 75-cm from the floor. The acoustictransducer is at front bystander position, ref ISO7779 (1999), Section 8.6.2.