Acoustics; Table 11. Acoustical Specifications - Dell External OEMR XL R210II Technical Manual

Dell
• Optimized Ventilation. R210 chassis has a custom ventilation design for
optimized air flow path. Each component and peripheral is ensured
sufficient air to cool.
• Power-to-Cool. Dell continues to improve the design and cooling efficiency
for server products. The power-to-cool ratio of the PowerEdge R210 is
improved over that of its predecessor, PowerEdge R200.

5.7 Acoustics

The acoustical design of the PowerEdge R210 reflects the following:
•
Adherence to Dell's high sound quality standards. Sound quality is
different from sound power level and sound pressure level in that it
describes how humans respond to annoyances in sound, like whistles, hums,
etc. One of the sound quality metrics in the Dell specification is
prominence ratio of a tone, as listed in the table below.
• Noise ramp and descent at bootup. Fan speeds, hence noise levels, ramp
during the boot process in order to add a layer of protection for component
cooling in case the system were not to boot properly.
• Noise levels vs. configurations. The noise level of PowerEdge R210 is not
dependent upon the hardware configuration of the system. The table below
shows the noise levels of the PowerEdge R210 with maximum configuration.
Configurations @
CPU DIMM
® ®
Intel Xeon
X3450 2.66 4 x 4GB
GHz
Standby: AC Power is connected to Power Supply Units but system is not turned on.
Idle: Reference ISO7779 (1999) definition 3.1.7; system is running in its OS but no
other specific activity.
Stressed Processor: An operating mode per ISO7779 (1999) definition 3.1.6. The
software MemBW4 is activated to stress the processors.
LwA–UL: The upper limit sound power level (LwA) calculated per section 4.4.2 of ISO
9296 (1988) and measured in accordance to ISO 7779 (1999).
LpA: A-Weighted sound pressure level. The system is placed in a rack with its bottom
at 75 cm from the floor. The acoustic transducer is at front bystander position, ref
ISO7779 (1999) Section 8.6.2.
Prominent tone: Criteria of D.5 and D.8 of ECMA-74 9th ed. (2005) are followed to
determine if discrete tones are prominent. The system is placed in a rack with its
PowerEdge R210 Technical Guide
Acoustical Specifications
Table 11.
°C
23 ± 2
ODD HDD
4 x 3.5" SAS
1 X DVD+/-
(450 GB/
RW
15000 RPM)
Definitions
L -UL
Operating
WA
Mode
(Bels)
Standby 2.8
Idle 6.5
Stressed
6.5
Processor
L PROMINENT
pA
(dBA) TONES
16 None
49 None
49 None
29