Figure 10. System Airflow Impedance; Table 21. Acoustic Requirements - Intel SC5299BRP Technical Product Specification

Power Sub-system
2.2.1.2 Acoustic Requirements
The fans speed shall vary linearly based on output loading and ambient temperature. The
declared sound power levels (LwAd) of the power supply unit (PSU) must meet the
requirements shown in the table below. Sound power must be measured according to ECMA 74
(www.ecma-international.org) and reported according to ISO 9296.
The acoustic measurement of the PSU shall be performed with the PSU fan operating at the
RPM corresponding to the operating conditions shown in the table below. The PSU acoustic
test report shall at the minimal include the PSU dimension, picture, fan model and size, fan
voltage (or duty cycle), RPM and PSU sound power level at each operating condition. The
proper RPM thermally sustainable shall be determined through PSU thermal testing, and shall
be submitted as appendix to the acoustic test report.
Operating Conditions
Maximum
Operating
Idle
2.2.1.3 Temperature Requirements
The power supply operates within all specified limits over the T
average air temperature difference ( T
not exceed 20 degrees C. All airflow passes through the power supply and not over the exterior
surfaces of the power supply.
26
System Flow Impedance
0.6
0.5
0.4
0.3
0.2
0.1
0
0 10
Power Supply Airflow (CFM)

Figure 10. System Airflow Impedance

Table 21. Acoustic Requirements

Inlet Temperature
Condition
45ºC
40 C
35 C
) from the inlet to the outlet of the power supply does
ps
Intel order number D37594-005
®
Intel Entry Server Chassis SC5299-E TPS
20 30
% of Maximum Loading
Condition
100%
60%
40%
temperature range. The
op
40
LwAd (BA)
6.5
5.2
4.7
Revision 3.1