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. The latest specifications information is always available at Lenovo Press website.

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
Environment
Water requirements

Acoustical noise emissions

The server has the following acoustic noise emissions declaration.

	Standard	Storage	GPU
Sound power levels (L_WAd)
Idling	6.6 Bel	7.4 Bel	7.4 Bel
Operating	8.1 Bel	7.5 Bel	8.6 Bel
Sound pressure level (L_pAm)
Idling	49.9 dBA	59.5 dBA	59.5 dBA
Operating	65.4 dBA	61.3 dBA	71.2 dBA

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

Config.	Standard	Storage	GPU
Chassis (2U)	Front 16 x 2.5''	Front 12 x 3.5''	Front 16 x 2.5''
Fan	4 x performance fans	6 x performance fans	6 x performance fans
Processor	1 x 300 W	1 x 240 W	1 x 300 W
DIMM	12 x 64 GB	12 x 64 GB	12 x 64 GB
Drive	16 x 2.4 TB SAS HDDs	Front 12 x 2 TB + rear 4 x 2 TB HDDs	16 x 2.4 TB SAS HDDs
RAID	1 x RAID 940-8i	1 x RAID 940-16i	1 x RAID 940-16i
OCP	Intel E810-DA2 10/25GbE SFP28 2-Port OCP
PSU	2 x 1800 W	2 x 1800 W	2 x 2400 W
GPU	None	None	3 x A100

Note

These sound levels were measured in controlled acoustical environments according to procedures specified by ISO7779 and are reported in accordance with ISO 9296.
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 SR655 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 operating temperature is outside ASHRAE A2 specification. Depending on the hardware configuration, SR655 V3 server also complies with ASHRAE Class H1 specification. System performance may be impacted when operating temperature is outside ASHRAE H1 specification. The restrictions to ASHRAE support are as follows (cooling by air): The ambient temperature must be limited to 35°C if the server has any of the following components: Broadcom 57454 10GBASE-T 4-port OCP Broadcom 57416 10GBASE-T 2-port OCP PCIe network interface cards (NICs) at a rate greater than or equal to 100 GB Parts with active optical cable (AOC) and at a rate of 25 GB The ambient temperature must be limited to 30°C if the server has any of the following components: 24 x 2.5" or 12 x 3.5" front bay, middle bay, or rear bay GPU adapters Parts with AOC and at a rate of greater than 25 GB Group E (320W <= cTDP <= 400W) processors 9754/9734/9654(P)/9554(P)/9174F 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 if the server has any of the following components: 9754/9734/9654(P)/9554(P)/9174F processor in a front 24 x 2.5"/12 x 3.5" configuration without middle/rear bay 9754/9734/9654(P)/9554(P)/9174F processor in a front 8 x 2.5"/8 x 3.5"/16 x 2.5" + GPU configuration Gen5 7.68 TB or larger capacity NVMe drives in a configuration with middle/rear bay 24 x 2.5" front bay + GPU Group A (240 W < cTDP ≤ 300 W) processor in a configuration with middle/rear bay For detailed thermal information, see Thermal rules. Note When the ambient temperature is greater than the supported max temperature, the server will shut down (ASHRAE 45°C). 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) Shipment/storage: 8% to 90%

ThinkSystem SR655 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 operating temperature is outside ASHRAE A2 specification.

Depending on the hardware configuration, SR655 V3 server also complies with ASHRAE Class H1 specification. System performance may be impacted when operating temperature is outside ASHRAE H1 specification.

The restrictions to ASHRAE support are as follows (cooling by air):

The ambient temperature must be limited to 35°C if the server has any of the following components:
- Broadcom 57454 10GBASE-T 4-port OCP
- Broadcom 57416 10GBASE-T 2-port OCP
- PCIe network interface cards (NICs) at a rate greater than or equal to 100 GB
- Parts with active optical cable (AOC) and at a rate of 25 GB
The ambient temperature must be limited to 30°C if the server has any of the following components:
- 24 x 2.5" or 12 x 3.5" front bay, middle bay, or rear bay
- GPU adapters
- Parts with AOC and at a rate of greater than 25 GB
- Group E (320W <= cTDP <= 400W) processors
- 9754/9734/9654(P)/9554(P)/9174F 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 if the server has any of the following components:
- 9754/9734/9654(P)/9554(P)/9174F processor in a front 24 x 2.5"/12 x 3.5" configuration without middle/rear bay
- 9754/9734/9654(P)/9554(P)/9174F processor in a front 8 x 2.5"/8 x 3.5"/16 x 2.5" + GPU configuration
- Gen5 7.68 TB or larger capacity NVMe drives in a configuration with middle/rear bay
- 24 x 2.5" front bay + GPU
- Group A (240 W < cTDP ≤ 300 W) processor in a configuration with middle/rear bay

For detailed thermal information, see Thermal rules.

Note

When the ambient temperature is greater than the supported max temperature, the server will shut down (ASHRAE 45°C). 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)
- Shipment/storage: 8% to 90%

Water requirements

ThinkSystem SR655 V3 is supported in the following environment:

Maximum pressure: 3 bars
Water inlet temperature and flow rates:
Water inlet temperature Water 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 lower 0.5 liters per minute (lpm) per server

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 please see Lenovo Neptune Direct Water-Cooling Standards.

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Environmental specifications

Acoustical noise emissions​

Environment​

Water requirements​

Acoustical noise emissions

Environment

Water requirements