Dell PowerEdge M420 Technical Manual

Also see for PowerEdge M420: Manual Command reference guide Owner's manual Administrator's guide Information update

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29 PowerEdge M420 Technical GuideThermal control also detects and responds to hardware configuration. Thermal managementadjusts cooling according to what the system really needs, and draws lower fan power draw andgenerates lower acoustical noise levels than those without such controls. Environmental specifications: The optimized thermal management makes the PowerEdgeM420 reliable under a wide range of operating environments as shown in Table 23. Whenoperating above 30°C ambient, performance impacts may be seen. For more information seetheDell PowerEdge M420 Systems Owner's Manual on Support.Dell.com/Manuals.The acoustical performance of the PowerEdge M420 is reflected in Table 15.Four sleeves, each containing four typically1 configured M420 blades, were installed in the M1000ehost chassis; all blades had the same configuration and same airflow impedance. Remaining bladeslots were filled with blanks of same impedance as blades. Acoustical measurements were made in23 ± 2 °C ambient.The M420 is built for high density and high performance. The great power density of the M420means that small increases in utilization require large increases in fan speed hence large increases inloudness. This means that loudness with M420s increases significantly with utilization; in fact, moreso than other Dell blade products.Configuration(23 ± 2°C ambient) CPUs Drives DIMMs PCI cards OperatingmodeLWA-UL2(bels)LpA3(dBA)Typical1 2 x 95W 1 x uSATASSD 6 1 mezzaninecardOperating4 8.9 71Idle5 7.9 631Typical configuration means 2x 95W CPUs, x 2GB DIMMs, 1x Mezzanine card, and 1x uSATA SSD.2 LWA-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).3 LpA 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).4Operating is a mode per ISO 7779 (2010) definition 3.1.6. Blade stressing applications vary widely thus also do respectiveoperating acoustical values; the values are given above as a likely range, for example, “likely greater than or equal to,”(≥). SPECPower™ at 50% utilization is the benchmark used for the lower bound here.5Idle: Reference ISO 7779 (2010) definition 3.1.7; system is running in its operating system but no other specific activity;