Dell OptiPlex 390 User Manual - Page 9
VAC to 240 VAC, 50 Hz to 60 Hz, 3.6 A/4.0 A, 5.0 - small form factor
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Power Coin-cell battery 3 V CR2032 lithium coin cell Voltage Mini-Tower 100 VAC to 240 VAC, 50 Hz to 60 Hz, 5.0 A Desktop 100 VAC to 240 VAC, 50 Hz to 60 Hz, 4.4 A Small Form Factor 100 VAC to 240 VAC, 50 Hz to 60 Hz, 3.6 A/4.0 A Wattage Mini-Tower 265 W Desktop 250 W Small Form Factor 240 W Maximum heat dissipation Mini-Tower 1390 BTU/hr Desktop 1312 BTU/hr Small Form Factor 1259 BTU/hr NOTE: Heat dissipation is calculated by using the power supply wattage rating. NOTE: The voltage selector switch is available only on non-EPA power supplies. NOTE: See the safety information that shipped with your computer for important voltage-setting information. Physical Height Width Depth Weight (Minimum) Mini-Tower Desktop Small Form Factor 360.00 mm 360.00 mm 290.00 mm (14.17 inches) (14.17 inches) (11.42 inches) 175.00 mm 102.00 mm 92.60 mm (6.89 inches) (4.01 inches) (3.64 inches) 417.00 mm 410.00 mm 312.00 mm (16.42 inches) (16.14 inches) (12.28 inches) 8.87 kg 7.56 kg 5.70 kg (19.55 lb) (16.67 lb) (12.57 lb) 9