Dell Optiplex 755 Technical Manualbook page 45

Dell™ optiplex™ 755 technical guiDe
acoustic noisE EMission inforMation, cont.
component
Memory
HDD (#, capacity)
Graphics Adapter
The Declared Noise Emission in accordance with ISO 9296 for the Dell Optiplex 755 SFF is as follows
re 10 Watts)
-12
operating moDe
HDD Operating
ODD Operating
90% CPU
The Declared A-weighted Sound Pressure Level in decibels (re 2x10
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
Idle
HDD Operating
ODD Operating
90% CPU
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
5
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.
Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2
6
version 1.0
CPU
RMSD
DeclareD sounD power (l
Idle
typical configuration
DeclareD sounD pressure (l
Operator Bystander
Position Position
(L )
pA
31
31
38
32
optiplex 755 sff
typical configuration
E4500
1GB DDRII 667MHz
80GB 7200 RPM SATA
DVD/CD-RW Combo
Integrated Adapter
optiplex 755 sff
typical configuration
4.0
4.1
5.0
4.1
Pa), at Operator, Bystander, and Desk Side Positions are measured in accordance
-5
optiplex 755 sff
)
pa
DeskSide
Position
(L ) (L )
pA pA
26 26
26 26
33 30
27 27
high-enD configuration
E6850
2GB DDRII 800MHz
160GB 7200 RPM SATA
DVD/DVD+/-R
ATI 2400 Pro
: (all values L expressed in bels
5
WAd
high-enD configuration
) DeclareD sounD power (l
wad
4.3
4.3
5.2
4.5
:
5
high-enD configuration
DeclareD sounD pressure (l
Operator Bystander
Position Position
(L ) (L )
pA pA
35 31
35 31
44 39
36 32
; 1 bel=10 decibels,
6
)
wad
)
pa
DeskSide
Position
(L )
pA
26
26
33
28
45
45