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39 PowerEdge 14th generation (14G) acoustical performance and dependencies | Document ID | version (optional)
13 PowerEdge M640 acoustics
In M1000e chassis, Dell EMC PowerEdge M640 is a blade server appropriate for unattended data center
environment. In VRTX chassis, Dell EMC PowerEdge M640 is a blade server appropriate for attended data
center environment or general use space in office environment. Table 13 summarizes the sound power level,
sound pressure level, and prominent tone performance of the M640 in a 23±2°C environment.
Acoustical performance
To capture the breadth of potential customer specifications and deployments, the M640 has been tested in
both M1000e and VRTX with different configurations. Table 13 summarizes the configuration and acoustical
performance of the PE M640. Each configuration has been tested according to Dell EMC acoustical
standards for rack-mounted servers.
PowerEdge M640 acoustical dependencies
 Ambient Temperature. For a similar workload fan speeds (and thus, acoustical noise) may increase
as ambient temperature increases. Please note there is ambient temperature restriction for M640,
defined in DPN: 2P9GM.
 High Wattage CPU. High-power (TDP) CPU cards may result in higher acoustical noise output.
 NVMe SSD. NVMe SSD consumes more power than other SATA/ SAS drives. It requires higher fan
speeds for cooling, and thus increased acoustical output is expected.
 System Thermal Profile Selected in BIOS. The default setting is “Power Optimized (DAPC)”, which
generally means lower fan speed and acoustics. If “Performance Optimized” is selected, fan speed
and acoustical noise may increase.