Dell OptiPlex 330 Technical Manualbook page 35

Dell™ optiplex™ 330 technical guiDe
acoustic noisE EMission inforMation, cont.
The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 330 DT is as follows
(all values L expressed in bels
WAd
The Declared A-weighted Sound Pressure Level in decibels (re 2x10
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
operating moDe
HDD Operating
ODD Operating
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
8
with no other peripheral device spinning. 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.
9 Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2.
version 1.0
Dell is a trademark of Dell inc. ©2008 Dell inc. All rights reserved.
; 1 bel=10 decibels, re 10
9
operating moDe
Idle
HDD Operating
ODD Operating
90% CPU
:
8
Idle
90% CPU
Watts):
-12
optiplex 330 Dt
typical configuration
DeclareD sounD power (l
Pa), at Operator, Bystander, and Desk Side Positions
-5
optiplex 330 Dt
typical configuration
DeclareD sounD pressure (l
operator position
(l )
pa
30
30
43
30
)
wad
3.8
3.8
5.1
3.8
)
pa
bystander Deskside position
position (l ) (l
pa
25
25
36
25
8
)
pa
21
21
35
21
35 35