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)
1
L
-UL is the upper limit sound power levels (L
WA
accordance to ISO 7779 (2010).
2
L
is the averaged A-weighted sound pressure level of four bystanders in accordance with ISO 7779 (2010) Section
pA
8.6.2. The system is placed inside 42U rack in 25 cm height.
3
Standby: AC Power is connected to power supply units but the system is not turned on.
4
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
28
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
WA
Operating
NDC
PCI cards
mode
Standby
Any
None
mezzanine
card
Idle
Standby
Any
1Gb
mezzanine
card
Idle
Dell
1
2
L
-UL
L
WA
pA
(bels)
(dBA)
3
6.7
53
4
7.2
56
3
6.8
53
4
7.2
56
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