Dell OptiPlex 755 - Manual (Page 45)

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