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55 PowerEdge R720 and R720xd Technical Guide

Table 31 details the environmental specifications for the R720 and R720xd. For additional

information about environmental measurements for specific system configurations, see

Dell.com/environmental_datasheets.

Fresh Air: temperature, humidity, altitude de-rating

Continuous

operation

10°C to 35°C (50°F to 95°F) at 10% to 80% relative humidity with 26°C (78.8°F) maximum

dew point (maximum wet bulb temperature). De-rate maximum allowable dry bulb

temperature at 1°C per 300m above 950m (1°F per 547 ft above 3117 ft).

Expanded

operation

When operating in the expanded temperature range, system performance may be impacted,

and ambient temperature warnings may be reported on the LCD and in the System Event

Log.

≤ 10% of annual operating hours: 5°C to 10°C and 35°C to 40°C (with no direct sunlight on

the equipment) at 5% to 85% relative humidity with 26°C dew point (maximum wet bulb

temperature). Outside the standard operating temperature (10°C to 35°C), the system can

operate down to 5°C or up to 40°C for a maximum of 10% of its annual operating hours. For

temperatures between 35°C and 40°C (95°F to 104°F), de-rate maximum allowable dry bulb

temperature by 1°C per 175m above 950m (1°F per 319 ft above 3117 ft).

≤ 1% of annual operating hours: –5°C to 5°C and 40°C to 45°C (with no direct sunlight on

the equipment) at 5% to 90% relative humidity with 26°C dew point (maximum wet bulb

temperature). Outside the standard operating temperature (10°C to 35°C), the system can

operate down to –5°C or up to 45°C for a maximum of 1% of its annual operating hours. For

temperatures between 40°C and 45°C (104°F to 113°F), de-rate maximum allowable dry bulb

temperature by 1°C per 125m above 950m (1°F per 228 ft above 3117 ft).

Expanded operation restrictions:

 No cold startup below 5°C

 Maximum altitude for the operating temperature must be 3050m (10,000ft)

 Redundant power supplies are required

 Not supported:

- Express Flash PCIe SSD

- GPU

- LRDIMM

- 130W 4-core processors

- Non-redundant power supplies

- Peripheral cards not qualified by Dell

- Peripheral cards greater than 25W

 For the PowerEdge R720, a maximum 130W processor is supported in either the 8-drive

bay or 16-drive bay chassis.

 The following additional restrictions apply to PowerEdge R720xd:

- Maximum 95W processor is supported on 3.5-inch hard drive chassis

- Maximum 115 W processor is supported on 2.5-inch hard drive chassis

- Only SSDs are supported in the hard drive slots on the back of the 3.5-inch hard

drive chassis.

Temperature

Operating

See Fresh Air for temperature information

Storage

–40

C to 65

C (-40

F to 149

F) with a maximum temperature gradation of 20

C per hour

Relative humidity

Operating

See Fresh Air for relative humidity information

Storage

5% to 95% at a maximum wet bulb temperature of 33°C (91°F); atmosphere must be

condensing at all times

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