Technical Guide

Table Of Contents
Table 16. Acoustical configurations of R550 (continued)
Configuration R550 single socket R550 typical 3.5-inch R550 typical 2.5-inch R550 feature rich
PCI 2 NA NA NA NA
PCI 3 NA NA NA NA
PCI 4 NA NA NA NA
PCI 5 NA NA NA NA
PCI 6 NA NA NA NA
M.2 BOSS NA NA NA NA
PERC Front H345 Front H345 Front H345 Front H345
Table 17. Acoustical performance of R550 acoustical configurations
Configuration R550 single
socket
R550 typical 3.5-
inch
R550 typical 2.5-
inch
R550 feature rich
Acoustical Performance: Idle/ Operating @ 23 °C Ambient
L
wA,m
(B) Idle 4.7 5.0 4.7 5.3
Operating 5.0 5.0 4.8 5.3
K
v
(B) Idle 0.4 0.4 0.4 0.4
Operating 0.4 0.4 0.4 0.4
L
pA,m
(dB) Idle 33 34 33 40
Operating 37 38 35 41
Prominent tones No prominent tones in Idle and Operating
Acoustical Performance: Idle @ 28 °C Ambient
L
wA,m
(B) 5.0 5.3 5.1 5.6
K
v
(B) 0.4 0.4 0.4 0.4
L
pA,m
(dB) 36 35 36 41
Acoustical Performance: Max. Loading @ 35 °C Ambient
L
wA,m
(B) 5.5 5.5 5.4 5.8
K
v
(B) 0.4 0.4 0.4 0.4
L
pA,m
(dB) 40 41 40 44
L
wA,m
: The declared mean A-weighted sound power level (LwA) is calculated per section 5.2 of ISO 9296 (2017) with data
collected using the methods described in ISO 7779 (2010). Data presented here may not be fully compliant with ISO 7779.
L
pA,m
: The declared mean A-weighted emission sound pressure level is at the bystander position per section 5.3 of ISO 9296
(2017) and measured using methods described in ISO 7779 (2010). The system is placed in a 24U rack enclosure, 25cm above a
reflective floor. Data presented here may not be fully compliant with ISO 7779.
Prominent tones: Criteria of D.6 and D.11 of ECMA-74 are followed to determine if discrete tones are prominent and to report
them, if so.
Idle mode: The steady-state condition in which the server is energized but not operating any intended function.
Operating mode: The maximum of the steady state acoustical output at 50% of Processor TDP or active HDDs per C.9.3.2 in
ECMA-74 .
Each configuration has been tested according to Dell EMC acoustical standards for rack-mounted servers.
Power, thermal, and acoustics
25