Dell poweredge VRTX Manual técnico - Página 25
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balanced DIMMs; 16 balanced DIMMs versus 24 balanced DIMMs with a standard M620 blade
server.
One or more M620 server nodes with the standard
2
—
Idle
3
LwA-UL
= 5.5 bels
>
4
LpA
= 37 dBA
>
2
—
Operating
2
LwA-UL
= 6.2 bels
>
3
LpA
= 41 dBA
>
No prominent tones
>
—
What this means: Operating values would begin to compete with normal conference room
environments or conversation levels depending upon proximity to PowerEdge VRTX chassis.
For this configuration, the system at 50% workload is 50% louder than at idle.
Other acoustical information includes the following:
TurboBoost mode: Acoustical levels can be further reduced during operating mode by choosing
to turn TurboBoost mode off for the processor.
Utilization: As workload on the processor increases, acoustical levels also increase. The M520
and the enhanced acoustics M620 are less sensitive to utilization changes, but the standard
M620 exhibits significant acoustical change with utilization. As utilization exceeds 50% workload,
acoustical output exceeds those values listed for operating above for the respective
configuration.
Transients: As utilization changes, such as from moderate to high workloads, blower module
speeds may temporarily exceed the steady-state values causing the acoustics to temporarily
increase.
Background noise levels vary from office to office and around the world, affecting what we hear.
For example, some offices may not use air conditioning and not experience the associated
broadband ambient background noise. If you are in a quiet open office area, you may wish to
choose one of the quieter acoustical configurations, such as the enhanced acoustics option for
the M620.
Data summary footnotes
1
Typical configuration:
—
Three M520 or M620 server nodes with Intel Xeon E5-2660 processors
—
Six 8GB DIMMs
—
Sixteen 10k 2.5-inch hard disk drives
—
Four 1100W power supplies
2
Test conditions follow sections 3.1 and 5.3 of ISO 7779 (2010) for idle and operating, where
operating is simulated by exercising processor at 50% of the thermal design power (TDP.)
3
LwA – UL: Upper limit sound power levels (LwA) calculated per section 4.4.1 of ISO 9296 (1988)
and measured in accordance to ISO 7779 (2010).
4
LpA: Front bystander position A-weighted sound pressure level calculated per section 4.3 of ISO
9296 (1988) and measured in accordance with ISO 7779 (2010). The system is placed at a deskside
location next to the standard ISO 7779 table.
5
Prominent tone: Criteria of D.6 and D.11 of ECMA-74 11th edition (2010) are followed to determine
if discrete tones are prominent; system is placed in deskside location next to ISO 7779 table and
acoustic transducer is at front bystander position, ref ISO 7779.
25
PowerEdge VRTX Technical Guide
4
processor and heatsink option