Dell PowerEdge M520 Technical Manual - Page 28

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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 M520

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 the

PowerEdge M520 Systems Owner's Manual

The acoustical performance of the PowerEdge M520 is reflected in Table 15. The addition of some

components can cause an increase in fan speed and acoustical output. Contributors to acoustical

output can include:

The system thermal profile selected in BIOS (for example, Power optimized DAPC or



Performance optimized)

Number of installed processors



Population of modular, non-homogenous modular deployment



Impedance of blanks

Configuration

CPUs

(23 ± 2°C

ambient)

1 x 80W

Minimum

(4 core)

2 x 95W

Typical

(8 core)

-UL is the upper limit sound power levels (L

accordance to ISO 7779 (2010).

is the averaged A-weighted sound pressure level of four bystanders in accordance with ISO 7779 (2010) Section

8.6.2. The system is placed inside 42U rack in 25 cm height.

Standby: AC Power is connected to power supply units but the system is not turned on.

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

PowerEdge M520 Technical Guide

on Support.Dell.com/Manuals.

Hard

HDD

DIMMs

drives

controller

1 x

4 x

Onboard

SATA

2GB

SATA

(7.2K)

2 x SAS

8 x

PERC H310

(10K)

4GB

(mini)

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

Operating

NDC

PCI cards

mode

Standby

Any

None

mezzanine

card

Idle

Standby

Any

1Gb

mezzanine

card

Idle

Dell

-UL

(bels)

(dBA)

6.7

7.2

6.8

7.2