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Thermal rules

This topic provides thermal rules of the server.

Abbreviations used in the tables below are defined as follows:

  • NV: NVMe

  • S/S: SAS/SATA

  • N/A: not applicable

  • RDIMM: registered DIMM

  • MRDIMM: Multiplexed Rank DIMM

  • PNCM: Processor Neptune Core Module

  • Max.Temp.: Maximum ambient temperature at sea level

  • E: entry

  • U: ultra

  • S: standard

  • P: performance

  • SW: single-wide

  • DW: double-wide

Note

  • For E3.S 2T CXL memory (CMM) rules, see DDR5 RDIMMs mixed with CXL memory modules.

  • For specific supported configurations with 2.5"/3.5" front drive bays or E3.S front bays, see Internal cable routing.

  • On air-cooled servers, processor 6732P is supported only in standard configurations with 8 x 2.5" front drive bays and performance fans at a maximum temperature of 25°C.

  • On servers without Compute Complex Neptune Core Module, ThinkSystem NVIDIA BlueField-3 VPI QSFP112 2P 200G PCIe Gen5 x16 B3220 is supported only in the following configurations:

    • standard configurations with performance fans (30°C or lower)

    • storage configurations with performance fans and 24 x 2.5" front drive bays or E3.S front bays and without middle or rear drive bays (25°C or lower)

    • GPU configurations with 8 x 2.5" AnyBay front drive bays or 0–4 E3.S backplanes (30°C or lower)

    • GPU configurations with 16 x 2.5" AnyBay front drive bays (25°C or lower)

  • On servers with Compute Complex Neptune Core Module, ThinkSystem NVIDIA BlueField-3 VPI QSFP112 2P 200G PCIe Gen5 x16 B3220 is supported at a maximum temperature of 30°C.

  • On air-cooled servers, a ConnectX-8 adapter used with ThinkSystem NDR/NDR200 QSFP112 IB Multi Mode Solo-Transceiver is supported in the following configurations:

    • standard configurations with performance fans (30°C or lower)

    • storage configurations with performance fans and 24 x 2.5" front drive bays or E3.S front bays and without middle or rear drive bays (25°C or lower)

    • GPU configurations with 8 x 2.5" or 16 x 2.5" AnyBay front drive bays or 0–4 E3.S backplanes (30°C or lower)

    • GPU configurations with 24 x 2.5" AnyBay front drive bays (25°C or lower)

  • On servers with Processor Neptune Core Module, a ConnectX-8 adapter is supported in the following configurations:

    • standard configurations with performance fans (35°C or lower)

    • storage configurations with performance fans (30°C or lower)

    • GPU configurations with 8 x 2.5" or 16 x 2.5" front drive bays or 0–4 E3.S backplanes (35°C or lower)

    • GPU configurations with 24 x 2.5" or 8 x 3.5" front drive bays or 6/8 E3.S backplanes (30°C or lower)

  • For servers without Compute Complex Neptune Core Module, make sure to install DIMM fillers in all empty DIMM slots in the following configurations :

    • configurations in which the CPU TDP is greater than or equal to 205 W

    • configurations with GPU adapters

    • configurations with middle drive bays

    • configurations with MRDIMMs or 3DS RDIMMs

  • For servers with Compute Complex Neptune Core Module, make sure to install DIMM fillers in all empty DIMM slots in configurations with MRDIMMs or 3DS RDIMMs.

  • For air-cooled servers equipped with any of the following parts, the ambient temperature is limited to 35°C or lower:

    • ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-port OCP/PCIe Ethernet Adapter

    • ThinkSystem Broadcom 57416 10GBASE-T 2-port OCP/PCIe Ethernet Adapter

    • ThinkSystem Mellanox ConnectX-6 Dx 100GbE QSFP56 2-port PCIe Ethernet Adapter

    • ThinkSystem Broadcom 57414 10/25GbE SFP28 2-port PCIe Ethernet Adapter V2

    • ThinkSystem Broadcom 57414 10/25GbE SFP28 2-port OCP Ethernet Adapter

    • ThinkSystem Broadcom 57504 10/25GbE SFP28 4-port PCIe/OCP Ethernet Adapter

    • ThinkSystem NVIDIA ConnectX-7 NDR200/200GbE QSFP112 2-port PCIe Gen5 x16 InfiniBand Adapter

    • ThinkSystem NVIDlA ConnectX-7 NDR400 OSFP 1-port PCle Gen5 VPI Adapter

    • ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP/PCIe Ethernet Adapter

    • ThinkSystem Broadcom 57412 10GBASE-T 4-port OCP/PCIe Ethernet Adapter

    • ThinkSystem Nvidia ConnectX-6 Dx 100GbE QSFP56 2-port OCP Ethernet Adapter(Generic)

    • ThinkSystem Broadcom 57508 100GbE QSFP56 2-Port OCP Ethernet Adapter

    • ThinkSystem Broadcom 57508 100GbE QSFP56 2-port PCIe 4 Ethernet Adapter V2

    • ThinkSystem Intel E610-T2 10GBASE-T 2-port OCP Ethernet Adapter(Generic FW)

    • ThinkSystem Nvidia ConnectX-7 10/25GbE SFP28 4-Port PCIe Ethernet Adapter(Generic)

    • ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

    • ThinkSystem NVIDIA ConnectX-8 8240 400GbE / 400Gb/s IB QSFP112 2-port PCIe Gen6 x16 (Generic FW)

    • Optical Transceiver, Accelink 10GBASE-SR SFP+ 850nm, 300m (OM3), DDM Transceiver Module

    • L1; 3M/10M 25G AOC

    • 25Gb Ethernet SFP28 Optic/Transceiver Gen 2

    • 10G SFP+ SR Optic (LC) Transceiver

    • ThinkSystem Finisar Dual Rate 10G/25G SR SFP28 Transceiver

    • 25GBase-SR transceiver

    • Lenovo Dual Rate 10G/25G SR SFP28 85C Transceiver

  • For air-cooled servers equipped with any of the following parts, the ambient temperature is limited to 25°C or lower in configurations with 12 x 3.5" front drive bays and >= 300 W processors and limited to 30°C or lower in other configurations:

    • L1; 3M/5M/10M 100G AOC

    • Lenovo 15m/1m 100G QSFP28 Active Optical Cable

    • Lenovo 10M/20M NVIDIA NDR Multi Mode MPO12 APC Optical Cable

    • 5m/10m/20m Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable L1/SBB

    • 15m/3m Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable L1/SBB

    • Lenovo 3M/5M/7M NVIDIA NDR Multi Mode MPO12 APC Optical Cable

    • Lenovo 10m 400G QSFP112 Active Optical Cable

    • ThinkSystem NDR OSFP400 IB Multi Mode Solo-Transceiver

    • 100GBase-SR4 QSFP28 Transceiver

    • 100G SR4 Optic/Transceiver Gen2

    • ThinkSystem NVIDIA BlueField-3 VPI QSFP112 2P 200G PCIe Gen5 x16 B3220

    • ThinkSystem NDR/NDR200 QSFP112 IB Multi Mode Solo-Transceiver

  • For servers equipped with Compute Complex Neptune Core Module and any of the following parts, the ambient temperature is limited to 35°C or lower:

    • ThinkSystem Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-port OCP/PCIe Ethernet Adapter

    • ThinkSystem Broadcom 57416 10GBASE-T 2-port OCP/PCIe Ethernet Adapter

    • ThinkSystem Mellanox ConnectX-6 Dx 100GbE QSFP56 2-port PCIe Ethernet Adapter

    • ThinkSystem Broadcom 57414 10/25GbE SFP28 2-port PCIe Ethernet Adapter V2

    • ThinkSystem Broadcom 57414 10/25GbE SFP28 2-port OCP Ethernet Adapter

    • ThinkSystem Broadcom 57504 10/25GbE SFP28 4-port PCIe/OCP Ethernet Adapter

    • ThinkSystem NVIDIA ConnectX-7 NDR200/200GbE QSFP112 2-port PCIe Gen5 x16 InfiniBand Adapter

    • ThinkSystem NVIDlA ConnectX-7 NDR400 OSFP 1-port PCle Gen5 VPI Adapter

    • ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP/PCIe Ethernet Adapter

    • ThinkSystem Broadcom 57412 10GBASE-T 4-port OCP/PCIe Ethernet Adapter

    • ThinkSystem Nvidia ConnectX-6 Dx 100GbE QSFP56 2-port OCP Ethernet Adapter(Generic)

    • ThinkSystem Broadcom 57508 100GbE QSFP56 2-Port OCP Ethernet Adapter

    • ThinkSystem Broadcom 57508 100GbE QSFP56 2-port PCIe 4 Ethernet Adapter V2

    • ThinkSystem Intel E610-T2 10GBASE-T 2-port OCP Ethernet Adapter(Generic FW)

    • ThinkSystem Nvidia ConnectX-7 10/25GbE SFP28 4-Port PCIe Ethernet Adapter(Generic)

    • ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

    • ThinkSystem NVIDIA ConnectX-8 8240 400GbE / 400Gb/s IB QSFP112 2-port PCIe Gen6 x16 (Generic FW)

    • Optical Transceiver, Accelink 10GBASE-SR SFP+ 850nm, 300m (OM3), DDM Transceiver Module

    • L1; 3M/10M 25G AOC

    • 25Gb Ethernet SFP28 Optic/Transceiver Gen 2

    • 10G SFP+ SR Optic (LC) Transceiver

    • ThinkSystem Finisar Dual Rate 10G/25G SR SFP28 Transceiver

    • 25GBase-SR transceiver

    • Lenovo Dual Rate 10G/25G SR SFP28 85C Transceiver

    • L1; 3M/5M/10M 100G AOC

    • Lenovo 15m/1m 100G QSFP28 Active Optical Cable

    • Lenovo 10M/20M NVIDIA NDR Multi Mode MPO12 APC Optical Cable

    • 5m/10m/20m Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable L1/SBB

    • 15m/3m Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable L1/SBB

    • Lenovo 3M/5M/7M NVIDIA NDR Multi Mode MPO12 APC Optical Cable

    • Lenovo 10m 400G QSFP112 Active Optical Cable

    • ThinkSystem NDR OSFP400 IB Multi Mode Solo-Transceiver

    • 100GBase-SR4 QSFP28 Transceiver

    • 100G SR4 Optic/Transceiver Gen2

Standard configurations​

This section provides thermal information for standard configurations.
Table 1. Standard configurations with 2.5"/3.5" front drive bays
Front drive baysMax. Temp.CPU TDP (W)Heat sinkAir baffleFan typeDIMM
RDIMM (up to 32)MRDIMM (up to 16)

8 x 2.5"

16 x 2.5"

Backplane-less (2.5"/3.5")

45°C<= 185T-shape (P)SP<= 64 GB

N/A

40°C190 <= TDP <= 205T-shape (P)SP<= 64 GB

N/A

35°C<= 2052U (E)SS<= 128 GB

N/A

35°C<= 2052U (E)SPAll supported
35°C> 2052U (S)SS<= 128 GB

N/A

35°C> 2052U (S)SPAll supported
30°C<= 2052U (E)SSAll supported
30°C> 2052U (S)SSAll supported
35°CAll supportedPNCMSS<= 128 GB

N/A

35°CPNCMSPAll supported
30°CPNCMSSAll supported
Table 2. Standard configurations with E3.S front bays
BP Qty.Max. Temp.CPU TDP (W)Heat sinkAir baffleFan typeDIMM
RDIMM (up to 32)MRDIMM (up to 16)
0/1/2/3/435°C<= 2052U (E)SPAll supported
35°C> 2052U (S)SP
35°CAll supportedPNCMSS<= 128 GB

N/A

35°CPNCMSPAll supported
30°CPNCMSSAll supported

Storage configurations​

This section provides thermal information for storage configurations.
Table 3. Storage configurations with 24 x 2.5" front drive bays
Middle drive baysRear drive baysMax. Temp.CPU TDP (W)Heat sinkAir baffleFan typeDIMM
RDIMM (up to 32)MRDIMM (up to 16)

N/A

N/A

35°C<= 2052U (E)SS<= 32 GB

N/A

30°C<= 2052U (E)SS<= 64 GB

N/A

35°C<= 2052U (E)SP<= 128 GB

N/A

30°C<= 2052U (E)SPAll supported
35°C> 2052U (S)SP<= 128 GB

N/A

30°C> 2052U (S)SPAll supported

N/A

4 x 2.5" S/S

8 x 2.5" S/S

4 x 2.5" NV

30°C<= 2052U (E)SPAll supported
30°C> 2052U (S)SPAll supported

N/A

N/A

4 x 2.5" S/S

8 x 2.5" S/S

4 x 2.5" NV

35°CAll supportedPNCMSS<= 96 GB

N/A

35°CPNCMSP<= 128 GB

N/A

30°CPNCMSPAll supported

8 x 2.5" NVMe

N/A

30°CAll supportedT-shape (P)

N/A

PAll supported
35°CPNCM

N/A

S<= 96 GB

N/A

35°CPNCM

N/A

P<= 128 GB

N/A

30°CPNCM

N/A

PAll supported

8 x 2.5" S/S

4 x 2.5" S/S

8 x 2.5" S/S

30°CAll supportedT-shape (P)

N/A

PAll supported
35°CPNCM

N/A

S<= 96 GB

N/A

35°CPNCM

N/A

P<= 128 GB

N/A

30°CPNCM

N/A

PAll supported

8 x 2.5" NV

4 x 2.5" NV

30°CAll supportedT-shape (P)

N/A

UAll supported
25°CT-shape (P)

N/A

PAll supported
35°CPNCM

N/A

P<= 128 GB

N/A

30°CPNCM

N/A

PAll supported
30°CPNCM

N/A

S<= 96 GB

N/A

Table 4. Storage configurations with 12 x 3.5" front drive bays
Middle drive baysRear drive baysMax. Temp.CPU TDP (W)Heat sinkAir baffleFan typeDIMM
RDIMM (up to 32)MRDIMM (up to 16)

N/A

N/A

35°C<= 2052U (E)SS<= 32 GB

N/A

35°C<= 2052U (E)SP<= 128 GB

N/A

30°C<= 2052U (E)SS<= 64 GB

N/A

30°C<= 2052U (E)SPAll supported
35°C> 2052U (S)SP<= 128 GB

N/A

30°C> 2052U (S)SPAll supported
35°CAll supportedPNCMSS<= 64 GB

N/A

35°CPNCMSP<= 128 GB

N/A

30°CPNCMSPAll supported
25°CPNCMSSAll supported

N/A

4 x 3.5" S/S

4 x 2.5" NV

30°C<= 2052U (E)SPAll supported
30°C> 2052U (S)SPAll supported
35°CAll supportedPNCMSP<= 128 GB

N/A

30°CPNCMSPAll supported

8 x 2.5" NV

N/A

30°CAll supportedT-shape (P)

N/A

PAll supported
35°CPNCM

N/A

S<= 64 GB

N/A

35°CPNCM

N/A

P<= 128 GB

N/A

30°CPNCM

N/A

PAll supported
25°CPNCM

N/A

SAll supported
Table 5. Storage configurations with E3.S front bays
BP Qty.Max. Temp.CPU TDP (W)Heat sinkAir baffleFan typeDIMM
RDIMM (up to 32)MRDIMM (up to 16)
6/835°C<= 2052U (E)SP<= 128 GB

N/A

30°C<= 2052U (E)SPAll supported
35°C> 2052U (S)SP<= 128 GB

N/A

30°C> 2052U (S)SPAll supported
835°CAll supportedPNCMSP<= 128 GB

N/A

30°CAll supportedPNCMSPAll supported

GPU configurations​

This section provides thermal information for GPU configurations.
The server supports the following GPU adapters:

  • FHFL DW GPU adapters: RTX 6000 Ada, RTX 4500 Ada, H100 NVL, L40S

  • FHFL SW GPU adapter: RTX 4500 Ada

  • HHHL SW GPU adapter: L4

Note
In GPU configurations, MRDIMMs and 256 GB 3DS RDIMMs are supported only when the ambient temperature is 30°C or lower.
Table 6. GPU configurations with 2.5"/3.5" front drive bays
Front drive baysMax. Temp.CPU TDP (W)Heat sinkAir baffleFan typeMax. GPU Qty.
HHHL SWFHFL SWDW

8 x 2.5"

16 x 2.5"

24 x 2.5"

Backplane-less (2.5")

8 x 3.5"

35°C<= 2052U (E)SP10

N/A

N/A

> 2052U (S)SP10

N/A

N/A

All supportedT-shape (P)GPUP

N/A

42
35°CAll supportedPNCMSP9

N/A

N/A

PNCMGPUP

N/A

42
Table 7. GPU configurations with E3.S front bays
BP Qty.Max. Temp.CPU TDP (W)Heat sinkAir baffleFan typeMax. GPU Qty.
HHHL SWFHFL SWDW
0/1/2/3/4

35°C (U fans)

30°C (P fans)

<= 2052U (E)SU/P10

N/A

N/A

> 2052U (S)SU/P10

N/A

N/A

All supportedT-shape (P)GPUU/P

N/A

42
35°CAll supportedPNCMSP9

N/A

N/A

PNCMGPUP

N/A

42
6/8

35°C (U fans)

30°C (P fans)

<= 2052U (E)SU/P2

N/A

N/A

> 2052U (S)SU/P2

N/A

N/A

35°CAll supportedPNCMSP2

N/A

N/A

Configurations with Compute Complex Neptune Core Module​

This section provides thermal information for configurations with Compute Complex Neptune Core Module.

Front drive baysMax. Temp.CPU TDP (W)Air baffleFan typeMax. DIMM Qty.

8 x 2.5"

16 x 2.5"

16 x E3.S 1T

8 x E3.S 2T

35°C

All supportedSS16