Technical Guide

Table 18. Acoustical performance of R450 acoustical configurations (continued)
Configuration Single Socket Typical 3.5-
inch
Typical 2.5-inch Margin Rich
L
pA,m
(dB)
36 36 36 37
Acoustical Performance: Max. Loading @ 35°C Ambient
L
wA,m
(B)
6.9 7.0 7.0 6.9
K
v
(B)
0.4 0.4 0.4 0.4
L
pA,m
(dB)
54 55 55 53
NOTE:
● 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 CPU TDP or active HDDs per C.9.3.2
in ECMA-74 .
Power, thermal, and acoustics 27