Unit Environment and Operating
Conditions
Ultra-slim Desktop
Small Form Factor
Convertible Minitower
General Unit Operating Guidelines
Keep the computer away from excessive moisture, direct moisture and the extremes of heat and cold, to ensure that unit is
operated within the specified operating range.
Leave a 10.2 cm (4 in) clearance on all vented sides of the computer to permit the required airflow.
Never restrict airflow into the computer by blocking any vents or air intakes.
Do not stack computers on top of each other or place computers so near each other that they are subject to each other's re-
circulated or preheated air.
Occasionally clean the air vents on the front, back, and any other vented side of the computer. Lint, dust and other foreign
matter can block the vents and limit the airflow.
If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must be provided on the enclosure,
and the same operating guidelines listed above will still apply.
Temperature Range
Operating: 50° to 95° F (10° to 35° C)*
Non-operating: -22° to 140° F(-30° to 60° C)
Relative Humidity
Operating: 10% to 90% (non-condensing at ambient)
Non-operating: 5% to 95% (non-condensing at ambient)
Maximum Altitude
(unpressurized)
Operating: 10,000 ft (3048 m)
Non-operating: 30,000 ft (9144 m)
*
Operating temperature is de-rated 1.0 deg C per 300 m (1000 ft) to 3000 m (10,000 ft) above sea level, no direct sustained sunlight.
Maximum rate of change is 10 deg C/Hr. The upper limit may be limited by the type and number of options installed.
Power Supply
Ultra-slim Desktop
Small Form Factor
Convertible Minitower
Power Supply
200 watt custom power supply –
Active PFC)
240 watt custom power supply –
Active PFC
365 watt custom power supply –
Active PFC)
Operating Voltage Range
90 – 264 VAC 90 – 264 VAC 90 – 264 VAC
Rated Voltage Range
100 – 240 VAC 100 – 240 VAC 100 – 240 VAC
Rated Line Frequency
50/60 Hz 50/60 Hz 50/60 Hz
Operating Line Frequency
Range
47 – 63 Hz 47 – 63 Hz 47 – 63 Hz
Rated Input Current
4A 4A 6A
Rated Input Current 80Plus*
N/A
3.5A
5A
System Heat Dissipation
Typical 300 btu/hr
(76 kg-cal/hr)
Maximum 1050 btu/hr
(265 kg-cal/hr)
Typical 307 btu/hr
(77 kg-cal/hr)
Maximum 1260 btu/hr
(318 kg-cal/hr
Typical 307 btu/hr
(77 kg-cal/hr)
Maximum 1916 btu/hr
(483 kg-cal/hr)
System Heat Dissipation
80Plus* Power Supply
N/A
Typical 239 btu/hr
(60 kg-cal/hr)
Maximum 1024 btu/hr
(258 kg-cal/hr
Typical 239 btu/hr
(60 kg-cal/hr)
Maximum 1557 btu/hr
(392 kg-cal/hr)
Power Supply Fan
70mm variable speed 80mm variable speed 92mm variable speed
Energy Star 3.0 Compliant
Standard Power Supply
X X X
Energy Star 4.0 Compliant
80Plus* Power Supply
X X X
QuickSpecs
HP Compaq dc7700 Business PC
Technical Specifications
DA - 12543 Canada — Version 34 — October 29, 2008
Page 20
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