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Environmental specifications

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

Attention
Environment quality must be maintain 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​

The server has the following acoustic noise emissions declaration.

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

 TypicalGPU richStorage rich
Sound power levels (LWAd)
Idling6.7 Bel6.7 Bel7.4 Bel
Operating8.4 Bel8.3 Bel7.9 Bel
Sound pressure level (LpAm)
Idling52.3 dBA52.3 dBA59.9 dBA
Operating68.7 dBA67.7 dBA64.1 dBA
Note

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

  • The declared acoustic sound levels are based on the following configurations, which may change depending on configuration/conditions:
    ComponentsTypical configurationGPU rich configurationStorage rich configuration
    ProcessorOne 300 W processorOne 300 W processorOne 240 W processor
    MemoryTwelve 64 GB RDIMMsTwelve 64 GB RDIMMsTwelve 64 GB RDIMMs
    DriveTen SAS hard disk drivesTen SAS hard disk drivesTwelve SAS hard disk drives
    RAID adapterOne 440-16i CFF RAID adapterOne 440-16i CFF RAID adapterOne 440-16i CFF RAID adapter
    OCP adapterOne Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapterOne Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapterOne Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapter
    GPU adapterNoneOne A2 GPU adapterNone
    Power supply unitTwo 1100 W power supply unitsTwo 1100 W power supply unitsTwo 750 W power supply units

  • 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.

Ambient temperature management​

The server is supported in the following environment:

  • Air temperature:

    • Operating:

      • ASHRAE class H1: 5–25°C (41–77°F); when the altitude exceeds 900 m (2953 ft), the maximum ambient temperature value decreases by 1°C (1.8°F) with every 500 m (1640 ft) of altitude increase.

      • ASHRAE class A2: 10–35°C (50–95°F); when the altitude exceeds 900 m (2953 ft), the maximum ambient temperature value decreases by 1°C (1.8°F) with every 300 m (984 ft) of altitude increase.

      • ASHRAE class A3: 5–40°C (41–104°F); when the altitude exceeds 900 m (2953 ft), the maximum ambient temperature value decreases by 1°C (1.8°F) with every 175 m (574 ft) of altitude increase.

      • ASHRAE class A4: 5–45°C (41–113°F); when the altitude exceeds 900 m (2953 ft), the maximum ambient temperature value decreases by 1°C (1.8°F) with every 125 m (410 ft) of altitude increase.

    • Server off: 5–45°C (41–113°F)

    • Shipping or storage: -40–60°C (-40–140°F)

  • Maximum altitude: 3050 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)

    • Shipment or storage: 8%–90%

  • Particulate contamination

    Attention
    Airborne particulates and reactive gases acting alone or in combination with other environmental factors such as humidity or temperature might pose a risk to the server. For information about the limits for particulates and gases, see Particulate contamination.

Environment​

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

ThinkSystem SR635 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, SR635 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 (cooling by air or Liquid to Air Module (L2AM)):
  • The ambient temperature must be limited to 45°C or lower (TDP ＜ 240W) if the server meets the following conditions:

    • Installed with any TruDDR5 memory DIMM (64 GB or below)

    • Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives

    • Without rear drives or 7mm drives

    • Without GPU adapters

    • Without any PCIe network interface cards (NICs) at a rate equal to or above 25 GB

    • Without any parts with AOC and at a rate equal to or above 25 GB

    • Without closed loop heat sink

  • The ambient temperature must be limited to 40°C or lower (TDP ＜300 W) if the server meets the following conditions:

    • Installed with any TruDDR5 memory DIMM (64 GB or below)

    • Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives

    • Without rear drives or 7mm drives

    • Without GPU adapters

    • Without any PCIe network interface cards (NICs) at a rate equal to or above 25 GB

    • Without any parts with AOC and at a rate equal to or above 25 GB

    • Without closed loop heat sink

  • The ambient temperature must be limited to 35°C or lower (320 W ≤TDP ≤ 400 W) if the server has any of the following components:

    • TruDDR5 memory 128 GB DIMM

    • ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v2

    • NVMe, NVMe M.2 or NVMe AIC drives

    • Broadcom 57416 10GBASE-T 2-port OCP

    • Broadcom 57454 10GBASE-T 4-port OCP

    • PCIe network interface cards (NICs) at a rate equal to or above 25 GB

    • Parts with AOC and at a rate equal to or above 25 GB

    • GPU adapters

  • The ambient temperature must be limited to 30°C or lower if the server has any of the following components:

    • Rear drives

    • EDSFF drives

    • Parts with AOC and at a rate higher than 25 GB

    • PCIe network interface cards (NICs) at a rate higher than 25 GB

    • ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1

The restrictions to ASHRAE support are as follows (cooling by Direct Water Cooling Module (DWCM)):
  • The ambient temperature must be limited to 45°C or lower (TDP ＜ 240W) if the server meets the following conditions:

    • Installed with any TruDDR5 memory DIMM (64 GB or below)

    • Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives

    • Without rear drives or 7mm drives

    • Without GPU adapters

    • Without any PCIe network interface cards (NICs) at a rate equal to or above 25 GB

    • Without any parts with AOC and at a rate equal to or above 25 GB

  • The ambient temperature must be limited to 40°C or lower (TDP ＜300 W) if the server meets the following conditions:

    • Installed with any TruDDR5 memory DIMM (64 GB or below)

    • Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives

    • Without rear drives or 7mm drives

    • Without GPU adapters

    • Without any PCIe network interface cards (NICs) at a rate equal to or above 25 GB

    • Without any parts with AOC and at a rate equal to or above 25 GB

  • The ambient temperature must be limited to 35°C or lower (320 W ≤TDP ≤ 400 W) if the server has any of the following components:

    • TruDDR5 memory 128 GB DIMM (4800MHz/5600MHz/6400MHz)

    • ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v2

    • NVMe, NVMe M.2 or NVMe AIC drives

    • Broadcom 57416 10GBASE-T 2-port OCP

    • Broadcom 57454 10GBASE-T 4-port OCP

    • PCIe network interface cards (NICs) at a rate equal to or above 25 GB

    • Parts with AOC and at a rate equal to or above 25 GB

    • GPU adapters

  • The ambient temperature must be limited to 30°C or lower if the server has any of the following components:

    • Rear drives

    • EDSFF drives

    • Parts with AOC and at a rate higher than 25 GB

    • PCIe network interface cards (NICs) at a rate higher than 25 GB

    • ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1

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.

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 maintained over the lifetime of the system to receive warranty and support on affecting components. For more information, see Lenovo Neptune Direct Water-Cooling Standards.
ThinkSystem SR635 V3 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
  • 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