Dell OptiPlex 780 - Acoustic Noise Emission Information

DELL™ OPTIPLEX™ 780 TECHNICAL GUIDEBOOK V2.0
46
ACOUSTIC NOISE EMISSION INFORMATION
Component
Typical Configuration High-end Configuration
CPU E8500 Q9550
Memory 1GB DDR3 1066 MHz (x1) 2GB DDR3 1066 MHz (x2)
HDD (#, capacity) 160 GB 7200 RPM SATA2 250 GB 7200 RPM SATA2 (x2)
RMSD DVDRW/DVD dual config DVDRW/DVD dual config
Graphics Adapter GeForce 9300 GE Radeon HD 3470
OPTIPLEX 780 MT
The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 780 MT is as follows:
(all values L
WAd
expressed in bels; 1 bel=10 decibels, re 10
-12
Watts)
Operating Mode
Typical Configuration
Declared Sound Power (L
WAd
)
High-end Configuration
Declared Sound Power (L
WAd
)
Idle
3.8
N/A
HDD Operating
3.8
N/A
90% CPU
3.9
N/A
ODD Operating
5.1
N/A
The Declared A-weighted Sound Pressure Level in decibels (re 2x10
-5
Pa), at Operator, Bystander, and Desk Side Positions are
measured in accordance with ISO 7779 7.6.1, 7.6.2, and C.15.2 and declared in accordance with ISO 9296 for this product is as
follows
1
:
Operating Mode
Typical Configuration Declared Sound Pressure
(LpA)
High-end Configuration Declared Sound Pressure
(LpA)
Table-Top Floor-Standing Table-Top Floor- Standing
Operator
Position
(LpA)
Bystander
Position
(LpA)
Operator
Position
(LpA)
Bystander
Position
(LpA)
Operator
Position
(LpA)
Bystander
Position
(LpA)
Operator
Position
(LpA)
By-
stander
Position
(LpA)
Idle
28.2 23.2 22.1 20.6 28.0 23.2 21.4 20.5
HDD Operating
28.1 23.1 22.5 20.9 28.0 23.0 21.4 20.4
90% CPU
30.8 26.1 23.6 22.0 32.2 26.8 27.6 26.3
ODD Operating
33.6 42.1 35.6 34.3 33.3
1
All tests are conducted according to ISO 7779 and declared according to ISO 9296 except 90% CPU. For this mode, the system CPU was stressed
at 90% utilization with no other peripheral device actively seeking. This test mode is not specified in ISO 7779, but was measured using the same
microphone distances and measurement techniques defined for the other reported operating modes.
2
Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2