Lenovo ThinkSystem SR635 V3 User Manual page 21

Environment
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:
• The ambient temperature must be limited to 45°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 40°C or lower (TDP ＜ 240 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 if the server has any of the following components:
– TruDDR5 memory DIMM (128 GB)
– 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 of 25 GB
– Parts with AOC and at a rate of 25 GB
• The ambient temperature must be limited to 30°C or lower (300 W < TDP ≤ 400 W) if the server has any of the
following components:
– Rear drives
– EDSFF drives
– GPU adapters
– Parts with AOC and at a rate higher than 25 GB
– PCIe network interface cards (NICs) at a rate higher than 25 GB
• The ambient temperature must be limited to 25°C or lower if the server has any of the following configurations:
– 10 x 2.5, 8 x 2.5 or 6+4 x 2.5-inch drives with 9654/9654P processor and performance heat sink
– 4 x 2.5-inch drives (using 10 x 2.5-inch chassis) with 9174F/9554/9554P processor and performance heat sink
– 7mm drives with a closed loop heat sink installed and cTDP equal to or above 320 W
For detailed thermal information, see
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.
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.
"Thermal rules" on page 54.
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Chapter 1 Introduction
11