Dell OptiPlex 990 SF Spécifications télécharger pdf (Page 49)

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —V 1.0

ACOUSTIC NOISE EMISSION INFORMATION

OPTIPLEX 990 USFF

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.

Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2

The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 990 USFF is as follows:

(all values L

WAd

expressed in bels; 1 bel=10 decibels, re 10

-12

Watts)

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

Operating Mode

Typical Configuration

Declared Sound Power (L

WAd

)

Idle

3.7

HDD Operating

3.7

90% CPU

4.3

ODD Operating

4.7

Component Typical Configuration

CPU Intel l3,3.3GHZ,2c SNB 65W

Memory 1G DDR3 1333MHz

HDD (#, capacity) 250G 7200RPM SATA2

RMSD 8X 12.7 SATA DVDRW

Graphics Adapter Intel® HD Graphics Family

Operating Mode

Typical Configuration Declared Sound Pressure

(LpA)

Table-Top Floor-Standing

Operator

Position

(LpA)

Bystander

Position

(LpA)

Operator

Position

(LpA)

Bystander

Position

(LpA)

Idle

29.8 27.5 22.3 21.6

HDD Operating 30.8 29.2 21.9 21.5

90% CPU 36.3 34.9 26.4 25.0

ODD Operating 39.3 34.7 31.6 29.3

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