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.

Acoustical noise emissions
Ambient temperature management
Environment
Restrictions to ASHRAE support
Liquid to Air Module requirements
Direct Water Cooling Module requirements
Water requirements

Acoustical noise emissions
The server has the following acoustic noise emissions declaration:
Configuration	Minimal	Typical	Storage rich	GPU rich
Sound power level (L_WAd)	Idling: 5.6 Bel Operating: 7.6 Bel	Idling: 6.7 Bel Operating: 8.7 Bel	Idling: 7.5 Bel Operating: 7.7 Bel	Idling: 6.7 Bel Operating: 8.3 Bel
Sound pressure (L_pAm)	Idling: 41.3 dBA Operating: 61.5 dBA	Idling: 52.5 dBA Operating: 72.5 dBA	Idling: 60.1 dBA Operating: 62.8 dBA	Idling: 52.5 dBA Operating: 67.8 dBA
The declared sound levels are based on the following configurations, which may change depending on configurations or conditions.
Component	Minimal configuration	Typical configuration	Storage rich configuration	GPU rich configuration
Fan	Eight standard fans	Eight performance fans	Eight performance fans	Eight performance fans
Processor	Two 240 W processors	Two 300 W processors	Two 240 W processors	Two 300 W processors
Heat sink	Two 1U performance heat sinks	Two 1U performance heat sinks	Two 1U performance heat sinks	Two 1U performance heat sinks
Memory	Twenty-four 64 GB RDIMMs	Twenty-four 64 GB RDIMMs	Twelve 64 GB RDIMMs	Twenty-four 64 GB RDIMMs
Drive	Eight SAS hard disk drives	Ten SAS hard disk drives	Twelve SAS hard disk drives	Ten SAS hard disk drives
RAID adapter	One 440-16i CFF RAID adapter	One 940-16i SFF RAID adapter	One 940-16i SFF RAID adapter	One 940-16i SFF RAID adapter
OCP adapter	One Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapter	One Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapter	One Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapter	One Broadcom 5719 1GbE RJ45 4-port OCP Ethernet adapter
Power supply unit	Two 1100 W power supply units	Two 1100 W power supply units	Two 750 W power supply units	Two 1100 W power supply units
GPU adapter	None	None	None	One NVIDIA^® A2 GPU
Note These sound power levels are measured in controlled acoustical environments according to procedures specified by ISO 7779 and are reported in accordance with ISO 9296. The declared sound levels may change depending on configuration/conditions, for example, with high-power NICs, high-power processors and GPUs, such as ThinkSystem Mellanox ConnectX-6 HDR/200GbE QSFP56 1-port/2-port PCIe Adapter, ThinkSystem Broadcom 57454 10GBASE-T 4-port OCP module. 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 (984 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.

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 (984 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
ThinkSystem SR645 V3 complies with ASHRAE Class A2 specifications. System performance may be impacted when operating temperature is outside AHSARE A2 specification. Air temperature: Operating ASHARE 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). 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 A2: 8% to 80%; maximum dew point: 21°C (70°F) Shipment/storage: 8% to 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. Note The server is designed for standard data center environment and recommended to be placed in industrial data center. When the ambient temperature is greater than the supported maximum 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. The server is designed for standard data center environment and is recommended to be placed in industrial data center. Depending on hardware configurations, the server complies with ASHRAE Class A2, A3, or A4 specifications with certain thermal restrictions. System performance may be impacted when operating temperature is out of permitted conditions. For more information, refer to #server_specifications_environmental__restrictions.

Environment

ThinkSystem SR645 V3 complies with ASHRAE Class A2 specifications. System performance may be impacted when operating temperature is outside AHSARE A2 specification.

Air temperature:
- Operating
  - ASHARE 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).
- 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 A2: 8% to 80%; maximum dew point: 21°C (70°F)
- Shipment/storage: 8% to 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.

Note

The server is designed for standard data center environment and recommended to be placed in industrial data center.
When the ambient temperature is greater than the supported maximum 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.

The server is designed for standard data center environment and is recommended to be placed in industrial data center. Depending on hardware configurations, the server complies with ASHRAE Class A2, A3, or A4 specifications with certain thermal restrictions. System performance may be impacted when operating temperature is out of permitted conditions.

For more information, refer to #server_specifications_environmental__restrictions.

Restrictions to ASHRAE support
Ambient temperature	≤ 45°C	≤ 40°C	≤ 35°C	≤ 30°C	≤ 30°C
Processor	TDP ≤ 200 W	200 W ≤ TDP ≤ 240 W^{Note 1}	240 W ＜ TDP ≤ 300 W	240 W ＜ TDP ≤ 300 W^{Note 2}	320 W ≤ TDP ≤ 400 W
Note In this scenario, the following requirements should also be met: Installed with any 7mm boot drive Installed with any M.2 NVMe drive Installed with no less than four front 2.5'' hot-swap drives In this scenario, the following requirements should also be met: AOC ≥ 100 GB Installed with any rear 2.5-inch NVMe/SAS/SATA drive Installed with any TruDDR5 memory DIMM (256 GB or above) Installed with any passive GPU

Liquid to Air Module requirements
The restrictions to ASHRAE support are as follows (cooling by Liquid to Air Module (L2AM)): The ambient temperature must be no more than 30 °C if the server meets the following requirements: Two processors are installed. AOC in Slot 1 ＜100 GB

Liquid to Air Module requirements

The restrictions to ASHRAE support are as follows (cooling by Liquid to Air Module (L2AM)):

The ambient temperature must be no more than 30 °C if the server meets the following requirements:
- Two processors are installed.
- AOC in Slot 1 ＜100 GB

Direct Water Cooling Module requirements
The restrictions to ASHRAE support are as follows (cooling by Direct Water Cooling Module (DWCM)): If GPU is installed in the server, ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A v1 and ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1 is not supported. The ambient temperature must be no more than 30 °C if the server meets the following requirements: Two processors are installed. The standard fan is installed. AOC ≥ 100 GB The standard fan must be installed in ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A v1 for the following backplanes: Note The quantity of front 2.5'' hot-swap drives should be no more than 8 pieces. 4 x 3.5" backplane 4 x 2.5" NVMe backplane 4 x 2.5" AnyBay backplane 4 x 2.5" SAS/SATA backplane 8 x 2.5'' SAS/SATA backplane 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane 10 x 2.5" AnyBay backplane (Gen 5) 10 x 2.5" NVMe backplane (Gen 4) 10 x 2.5" SAS/SATA backplane 16-EDSFF drive backplane The performance fan must be installed in ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1 for the following backplanes: 4 x 3.5" backplane 8 x 2.5'' SAS/SATA backplane 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane 10 x 2.5" AnyBay backplane (Gen 5) 10 x 2.5" NVMe backplane (Gen 4) 10 x 2.5" SAS/SATA backplane 16-EDSFF drive backplane The ambient temperature must be no more than 35 °C if the server meets the following requirements: Two processors are installed. GPU ≤75W AOC ≥ 100 GB Qty. of front 2.5'' hot-swap drives ≤ 8 The performance fan must be installed in ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A v1 for the following backplanes: 4 x 3.5" backplane 8 x 2.5'' SAS/SATA backplane 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane 10 x 2.5" AnyBay backplane (Gen 5) 10 x 2.5" NVMe backplane (Gen 4) 10 x 2.5" SAS/SATA backplane 16-EDSFF drive backplane The performance fan must be installed in ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1 for the following backplanes: Note The quantity of front 2.5'' hot-swap drives should be no more than 8 pieces. 4 x 3.5" backplane 8 x 2.5'' SAS/SATA backplane 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane 10 x 2.5" AnyBay backplane (Gen 5) 10 x 2.5" NVMe backplane (Gen 4) 10 x 2.5" SAS/SATA backplane 16-EDSFF drive backplane

Direct Water Cooling Module requirements

The restrictions to ASHRAE support are as follows (cooling by Direct Water Cooling Module (DWCM)):

If GPU is installed in the server, ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A v1 and ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1 is not supported.
The ambient temperature must be no more than 30 °C if the server meets the following requirements:
- Two processors are installed.
- The standard fan is installed.
- AOC ≥ 100 GB
- The standard fan must be installed in ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A v1 for the following backplanes:
  Note
  The quantity of front 2.5'' hot-swap drives should be no more than 8 pieces.
  - 4 x 3.5" backplane
  - 4 x 2.5" NVMe backplane
  - 4 x 2.5" AnyBay backplane
  - 4 x 2.5" SAS/SATA backplane
  - 8 x 2.5'' SAS/SATA backplane
  - 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane
  - 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane
  - 10 x 2.5" AnyBay backplane (Gen 5)
  - 10 x 2.5" NVMe backplane (Gen 4)
  - 10 x 2.5" SAS/SATA backplane
  - 16-EDSFF drive backplane
- The performance fan must be installed in ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1 for the following backplanes:
  - 4 x 3.5" backplane
  - 8 x 2.5'' SAS/SATA backplane
  - 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane
  - 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane
  - 10 x 2.5" AnyBay backplane (Gen 5)
  - 10 x 2.5" NVMe backplane (Gen 4)
  - 10 x 2.5" SAS/SATA backplane
  - 16-EDSFF drive backplane
The ambient temperature must be no more than 35 °C if the server meets the following requirements:
- Two processors are installed.
- GPU ≤75W
- AOC ≥ 100 GB
- Qty. of front 2.5'' hot-swap drives ≤ 8
- The performance fan must be installed in ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A v1 for the following backplanes:
  - 4 x 3.5" backplane
  - 8 x 2.5'' SAS/SATA backplane
  - 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane
  - 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane
  - 10 x 2.5" AnyBay backplane (Gen 5)
  - 10 x 2.5" NVMe backplane (Gen 4)
  - 10 x 2.5" SAS/SATA backplane
  - 16-EDSFF drive backplane
- The performance fan must be installed in ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1 for the following backplanes:
  Note
  The quantity of front 2.5'' hot-swap drives should be no more than 8 pieces.
  - 4 x 3.5" backplane
  - 8 x 2.5'' SAS/SATA backplane
  - 6 x 2.5'' SAS/SATA + 2 x 2.5'' AnyBay + 2 x 2.5'' NVMe backplane
  - 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay backplane
  - 10 x 2.5" AnyBay backplane (Gen 5)
  - 10 x 2.5" NVMe backplane (Gen 4)
  - 10 x 2.5" SAS/SATA backplane
  - 16-EDSFF drive backplane

Water requirements

ThinkSystem SR645 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

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.

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