Dell PowerEdge M420 Technical Manual - Page 29

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Thermal control also detects and responds to hardware configuration. Thermal management

adjusts cooling according to what the system really needs, and draws lower fan power draw and

generates lower acoustical noise levels than those without such controls.



Environmental specifications: The optimized thermal management makes the PowerEdge

M420 reliable under a wide range of operating environments as shown in Table 23. When

operating above 30°C ambient, performance impacts may be seen. For more information see

Dell PowerEdge M420 Systems Owner's Manual

the

The acoustical performance of the PowerEdge M420 is reflected in Table 15.

Four sleeves, each containing four typically

host chassis; all blades had the same configuration and same airflow impedance. Remaining blade

slots were filled with blanks of same impedance as blades. Acoustical measurements were made in

23 ± 2 °C ambient.

The M420 is built for high density and high performance. The great power density of the M420

means that small increases in utilization require large increases in fan speed hence large increases in

loudness. This means that loudness with M420s increases significantly with utilization; in fact, more

so than other Dell blade products.

Configuration

CPUs

(23 ± 2°C ambient)

Typical

2 x 95W

Typical configuration means 2x 95W CPUs, x 2GB DIMMs, 1x Mezzanine card, and 1x uSATA SSD.

-UL is the upper limit sound power levels (L

accordance to ISO 7779 (2010).

is the average A-weighted sound pressure level from the four bystander positions calculated per section 4.3 of

ISO 9296 (1988) and measured in accordance with ISO 7779 (2010). The system is placed in a half rack enclosure (base

of system is 25 cm above reflective floor).

Operating is a mode per ISO 7779 (2010) definition 3.1.6. Blade stressing applications vary widely thus also do respective

operating 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.

Idle: Reference ISO 7779 (2010) definition 3.1.7; system is running in its operating system but no other specific activity;

PowerEdge M420 Technical Guide

configured M420 blades, were installed in the M1000e

Drives

DIMMs

1 x uSATA

1 mezzanine

SSD

) calculated per section 4.4.1 of ISO 9296 (1988) and measured in

on Support.Dell.com/Manuals.

Operating

PCI cards

mode

Operating

card

Idle

-UL

(bels)

(dBA)

8.9

7.9