31 PowerEdge M620 Technical GuideThermal control also detects and responds to hardware configuration. Thermal managementadjusts cooling according to what the system really needs, draws lower fan power and generateslower acoustical noise levels than those without such controls. Environmental specifications: The optimized thermal management makes the PowerEdgeM620 reliable under a wide range of operating environments as shown in Table 24. Whenoperating above 30°C ambient, performance impacts may be seen. For more information seetheDell PowerEdge M620 Systems Owner's Manual on Dell.com/Support/Manuals.Acoustical performanceThe acoustical performance of the PowerEdge M620 is reflected in Table 16. The addition of somecomponents can cause an increase in fan speed and acoustical output. Contributors to acousticaloutput can include: The system thermal profile selected in BIOS (for example, power- or performance -optimizedDAPC) Express Flash PCIe SSDs NDC Number of installed processors Population of modular, non-homogenous modular deployment Impedance of blanksTable 16. M620 acoustical performanceConfiguration(23 ± 2°Cambient)CPUs Harddrives DIMMs HDDcontroller NDC PCI cards OperatingmodeLWA-UL1(bels)LpA2(dBA)Minimum 1 x 80W(4 core)1 xSATA(7.2K)4 x4GBOnboardSATA None Any mezz.cardStandby3 6.8 54Idle4 7.4 59Typical 2 x 95W(8 core)2 x SAS(10K)16 x8GBPERC H310(mini) 1Gb Any mezz.cardStandby3 6.7 53Idle4 7.8 621LWA-UL is the upper limit sound power levels (LWA) calculated per section 4.4.1 of ISO 9296 (1988) and measured inaccordance to ISO 7779 (2010).2LpA is the average A-weighted sound pressure level from the four bystander positions calculated per section 4.3 ofISO 9296 (1988) and measured in accordance with ISO 7779 (2010). The system is placed in a half rack enclosure (baseof system is 25 cm above reflective floor).3Standby: AC power is connected to power supply units but the system is not turned on.4Idle: Reference ISO 7779 (2010) definition 3.1.7; system is running in its operating system but no other specific activity.