Dell PowerEdge R820 - Table 18. Acoustical Performance

32 PowerEdge R820 Technical Guide
Table 18 details the acoustical performance for the R820.
Table 18. Acoustical performance
Configuration
(23 ± 2°C
ambient)
CPUs
Hard
drives
Power
supply
unit
Memory
PCI
card/HDD
controller
Operating
mode
L
WA
-UL
1
(bels)
L
pA
2
(dBA)
Prominent
tones
3
Typical
4
8 x
300GB
SAS
(10K)
2 x
1100W
32 x
8GB
1600Hz
2 x 1GbE
NIC
2 x FC8
1 x PERC
H710
1 x H810
Idle
4
5.5
39
None
Stress
5
6.1
48
None
Feature rich
4
12 x
300GB
SAS
(10K)
2 x
1100W
32 x
8GB
1600Hz
2 x 1GbE
NIC
2 x FC8
1 x PERC
H710
1 x H810
Idle
4
5.6
40
None
Stress
5
6.2
49
None
1
L
WA
-UL is the upper limit sound power levels (L
WA
) calculated per section 4.4.1 of ISO 9296 (1988) and measured in
accordance to ISO 7779 (2010).
2
L
pA
is A-weighted sound pressure level at front bystander position measured by binaural head in accordance with ISO7779
(2010) Section 8.6.2. The system is placed inside rack in 75 cm height.
3
Prominent tone: Criteria of D.6 and D.11 of ECMA-74 11th ed. (2010) are followed to determine if discrete tones are
prominent. The system is placed inside rack in 75 cm height and acoustic transducer, binaural head, is at front bystander
position, ref ISO7779 (2010) Section 8.6.2.
4
Idle: Reference ISO 7779 (2010) definition 3.1.7; system is running in its operating system but no other specific activity.
5
Stressed processor: An operating mode per ISO 7779 (2010) definition 3.1.6. The software SPECPower at 50% is activated
to stress the processors and DIMM.
For more information on Dell’s acoustical design, see the Dell Enterprise Acoustics white paper.