Table 21. Acoustical Performance - Dell PowerEdge T620 Technical Manual

cooling in case the system does not boot properly. To keep the bootup process as quiet as
possible, the fan speed reached during bootup is limited to about half of full speed.
Table 21 details the acoustical performance for the T620.
Configuration
(23 ± 2°C CPUs
ambient)
Minimum 1
Typical 2
1
L -UL is the upper limit sound power levels (L
WA
accordance to ISO 7779 (2010).
2
L is the average A-weighted sound pressure level from the four bystander positions calculated per section 4.3 of
pA
ISO9296 (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).
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 in a half rack enclosure (base of system is 75 cm above reflective floor) and acoustic
transducer is at front bystander position, ref ISO 7779 (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% loading is
activated to stress the processors.
For more information on Dell's acoustical design, see the
37
PowerEdge T620 Technical Guide
Table 21. Acoustical performance
Power
Hard
supply Memory
drives
unit
1 x 3.5"
250GB 1 x
1 x 2GB
SATA 495W
(7.2K)
8 x 2.5"
2 x
300GB 8 x 4GB
750W
SAS (15K)
) calculated per section 4.4.1 of ISO 9296 (1988) and measured in
WA
Operating
PCI cards
mode
4
Idle
None
5
Stressed
1 x PERC
4
Idle
H710
1 x 10GbE
5
Stressed
NIC
Dell Enterprise Acoustics
1 2
L -UL L
Prominent
WA pA
tones
(bels) (dBA)
3.7 24 None
3.8 24 None
4.6 30 None
4.6 30 None
white paper.
3