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Environmental specifications

Summary of the environmental specifications of server. Depending on the model, some features might not be available, or some specifications might not apply.

Attention

Environment quality must be maintained over the lifetime of the system to receive warranty and support on affecting components. For water quality requirement, see Lenovo Neptune Direct Water-Cooling Standards.

Acoustical noise emissions​

Acoustical noise emissions

The server has the following acoustic noise emissions declaration.

Table 1. Acoustic noise emissions declaration

Acoustic performance @ 25°C ambient

ConfigurationTypical

Declared mean A-weighted sound power level, LWA,m (B)

Statistical adder for verification, Kv (B) = 0.4

Idle mode6.6
Operating mode8.5

Declared mean A-weighted emission sound pressure level, LpA,m (dB)

Bystander position

Idle mode54
Operating mode73
Note

  • These sound levels were measured in controlled acoustical environments according to procedures specified by ISO7779 and are reported in accordance with ISO 9296.

  • Idle mode is the steady state in which the server is powered on but not operating any intended function. Operating mode is 100% GPU with 80% CPU TDP.

  • The declared acoustic sound levels are based on the following configurations, which may change depending on configuration or conditions.

    • Typical: GPU chassis, 6*Ultra 6056 fans, 2 x 350 W CPUs, 4x H100 NVL 400W GPUs, 16 x 64 GB RDIMMs, 8 x 2.5" NVME 3.84TB HDDs, 2 x ThinkSystem Broadcom 57508 100GbE QSFP56 2-Port OCP Ethernet Adapter, 2 x 2700W PSUs

  • Government regulations (such as those prescribed by OSHA or European Community Directives) may govern noise level exposure in the workplace and may apply to you and your server installation. The actual sound pressure levels in your installation depend upon a variety of factors, including the number of racks in the installation; the size, materials, and configuration of the room; the noise levels from other equipment; the room ambient temperature, and employee's location in relation to the equipment. Further, compliance with such government regulations depends on a variety of additional factors, including the duration of employees' exposure and whether employees wear hearing protection. Lenovo recommends that you consult with qualified experts in this field to determine whether you are in compliance with the applicable regulations.

Environment​

Environment

ThinkSystem SR650a V4 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, SR650a V4 server also complies with ASHRAE Class H1 specification. System performance may be impacted when the operating temperature is outside ASHRAE H1 specification.

For detailed thermal information, see Thermal rules.
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: -10°C to 60°C (14°F to 140°F)

    • Shipment/storage: -40°C to 70°C (-40°F to 158°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: 20%–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)

    • Shipment/storage: 8% to 90%

Water requirements​

Water requirements
Attention
The water required to initially fill the system side cooling loop must be reasonably clean, bacteria-free water (<100 CFU/ml) such as de-mineralized water, reverse osmosis water, de-ionized water, or distilled water. The water must be filtered with an in-line 50 micron filter (approximately 288 mesh). The water must be treated with anti-biological and anti-corrosion measures. Environment quality must be maintain over the lifetime of the system to receive warranty and support on affecting components. For more information please see Lenovo Neptune Direct Water-Cooling Standards.
ThinkSystem SR650a V4 is supported in the following environment:

  • Maximum pressure: 3 bars

  • Water inlet temperature and flow rates:
    Water inlet temperatureWater flow rate
    50°C (122°F)1.5 liters per minute (lpm) per server
    45°C (113°F)1 liter per minute (lpm) per server
    40°C (104°F) or lower0.5 liters per minute (lpm) per server
Note
The water required to initially fill the system side cooling loop must be reasonably clean, bacteria-free water (<100 CFU/ml) such as de-mineralized water, reverse osmosis water, de-ionized water, or distilled water. The water must be filtered with an in-line 50 micron filter (approximately 288 mesh). The water must be treated with anti-biological and anti-corrosion measures.
  • Particulate contamination
    Attention: Airborne particulates (including metal flakes or particles) and reactive gases acting alone or in combination with other environmental factors such as humidity or temperature might pose a risk to the device that is described in this document.
  • Water quality requirement