Environment
ThinkSystem SR665 V3 complies with ASHRAE Class A2 specifications with most configurations, and depending on
the hardware configuration, also complies with ASHRAE Class A3 and Class A4 specifications. System performance
may be impacted when the operating temperature is outside ASHRAE A2 specification.
Depending on the hardware configuration, SR665 V3 server also complies with ASHRAE Class H1 specification.
System performance may be impacted when the operating temperature is outside ASHRAE H1 specification.
The restrictions to ASHRAE support are as follows:
• The ambient temperature must be limited to 35°C or lower if the server has any of the following components:
– Broadcom 57416 10GBASE-T 2-port OCP
– Broadcom 57454 10GBASE-T 4-port OCP
– Network interface cards (NICs) at a rate greater than or equal to 100 GB
– Parts with AOC and at the rate of 25 GB
• The ambient temperature must be limited to 30°C or lower if the server has any of the following components:
– 24 x 2.5" or 12 x 3.5" front bay with middle or rear bay
– GPU (except front 24 x 2.5" configurations and configurations with Group E processors)
– Parts with AOC and at a rate greater than 25 GB
– 9654(P)/9554(P)/9174F/9754/9734 processor in a front 8 x 2.5"/8 x 3.5"/16 x 2.5" standard configuration.
• The ambient temperature must be limited to 25°C or lower if the server has any of the following components:
– 9274F/9374F/9474F in a front 8 x 2.5"/8 x 3.5"/16 x 2.5" standard configuration
– 9654(P)/9554(P)/9174F/9754/9734 in a front 24 x 2.5" configuration without middle/rear bay
– 9654(P)/9554(P)/9174F/9754/9734 in a front 8 x 2.5"/8 x 3.5"/16 x 2.5" + GPU configuration
– 24 x 2.5" front bay + GPU
– Gen5 7.68 TB or larger capacity NVMe in a configuration with middle/rear bay
– Group A (240 W < cTDP ≤ 300 W) processor in a configuration with middle/rear bay
For detailed thermal information, see
“Thermal rules” on page 59.
Note: When the ambient temperature is greater than the supported max temperature (ASHARE A4 45°C), the server
will shut down. The server will not power on again until the ambient temperature falls within the supported temperature
range.
• Air temperature:
– Operating
– ASHRAE class H1: 5°C to 25°C (41°F to 77°F)
The maximum ambient temperature decreases by 1°C for every 500 m (1640 ft) increase in altitude above 900
m (2,953 ft)
– ASHRAE class A2: 10°C to 35°C (50°F to 95°F)
The maximum ambient temperature decreases by 1°C for every 300 m (984 ft) increase in altitude above 900
m (2,953 ft)
– ASHRAE class A3: 5°C to 40°C (41°F to 104°F)
The maximum ambient temperature decreases by 1°C for every 175 m (574 ft) increase in altitude above 900
m (2,953 ft)
– ASHRAE class A4: 5°C to 45°C (41°F to 113°F)
The maximum ambient temperature decreases by 1°C for every 125 m (410 ft) increase in altitude above 900
m (2,953 ft)
– Server off: 5°C to 45°C (41°F to 113°F)
– Shipment/storage: -40°C to 60°C (-40°F to 140°F)
• Maximum altitude: 3,050 m (10,000 ft)
• Relative Humidity (non-condensing):
– Operating
– ASHRAE class H1: 8%–80%; maximum dew point: 17°C (62.6°F)
– ASHRAE class A2: 8%–80%; maximum dew point: 21°C (70°F)
– ASHRAE class A3: 8%–85%; maximum dew point: 24°C (75°F)
– ASHRAE class A4: 8%–90%; maximum dew point: 24°C (75°F)
Chapter 1. Introduction 9
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