Dell OptiPlex 9020 Mini Tower Owner's Manual page 56

Feature
Network activity light on integrated network
adapter
Power supply diagnostic light
Table 27. Power
NOTE: Heat dissipation is calculated by using the power supply wattage rating.
Power
Mini-Tower
Small Form Factor
Ultra Small Form Factor
Coin-cell battery
Table 28. Physical Dimension
Physical Height
Mini-Tower 36.00 cm (14.17 inches)
Small Form Factor 29.00 cm (11.42 inches)
Ultra Small Form 23.70 cm (9.33 inches)
Factor
Table 29. Environmental
Feature
Temperature range:
Operating
Storage
Relative humidity (maximum):
56
Specification
Green — a good 100 Mbps connection exists between the
network and the computer.
Orange — a good 1000 Mbps connection exists between the
network and the computer.
Off (no light) — the computer is not detecting a physical
connection to the network.
Yellow light — A blinking yellow light indicates that network
activity is present.
Green light — The power supply is turned on and is functional.
The power cable must be connected to the power connector (at
the back of the computer) and the electrical outlet.
Wattage Maximum Heat Dissipation
290 W 989.00 BTU/hr
255 W 870.00 BTU/hr
200 W 682.40 BTU/hr
Width
17.50 cm (6.89 inches)
9.30 cm (3.66 inches)
6.50 cm (2.56 inches)
Specification
5 °C to 35 °C (41 °F to 95 °F)
–40 °C to 65 °C (–40 °F to 149 °F)
Voltage
100 VAC to 240 VAC, 50 Hz to 60
Hz, 5.4 A
100 VAC to 240 VAC, 50 Hz to 60
Hz, 4.6 A
100 VAC to 240 VAC, 50 Hz to 60
Hz, 2.9 A
3 V CR2032 lithium coin cell
Depth
41.70 cm (16.42 inches)
31.20 cm (12.28 inches)
24.00 cm (9.45 inches)
Weight
9.40 kg (20.72
lb)
6.00 kg (13.22
lb)
3.30 kg (7.28 lb)