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 bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	DIMM
Front drive bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	RDIMM (up to 32)	MRDIMM (up to 16)
8 x 2.5" 16 x 2.5" Backplane-less (2.5"/3.5")	45°C	<= 185	T-shape (P)	S	P	<= 64 GB	N/A
	40°C	190 <= TDP <= 205	T-shape (P)	S	P	<= 64 GB	N/A
	35°C	<= 205	2U (E)	S	S	<= 128 GB	N/A
	35°C	<= 205	2U (E)	S	P	All supported
	35°C	> 205	2U (S)	S	S	<= 128 GB	N/A
	35°C	> 205	2U (S)	S	P	All supported
	30°C	<= 205	2U (E)	S	S	All supported
	30°C	> 205	2U (S)	S	S	All supported
	35°C	All supported	PNCM	S	S	<= 128 GB	N/A
	35°C		PNCM	S	P	All supported
	30°C		PNCM	S	S	All supported

Table 2. Standard configurations with E3.S front bays
BP Qty.	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	DIMM
BP Qty.	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	RDIMM (up to 32)	MRDIMM (up to 16)
0/1/2/3/4	35°C	<= 205	2U (E)	S	P	All supported
	35°C	> 205	2U (S)	S	P	All supported
	35°C	All supported	PNCM	S	S	<= 128 GB	N/A
	35°C		PNCM	S	P	All supported
	30°C		PNCM	S	S	All 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 bays	Rear drive bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	DIMM
Middle drive bays	Rear drive bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	RDIMM (up to 32)	MRDIMM (up to 16)
N/A	N/A	35°C	<= 205	2U (E)	S	S	<= 32 GB	N/A
		30°C	<= 205	2U (E)	S	S	<= 64 GB	N/A
		35°C	<= 205	2U (E)	S	P	<= 128 GB	N/A
		30°C	<= 205	2U (E)	S	P	All supported
		35°C	> 205	2U (S)	S	P	<= 128 GB	N/A
		30°C	> 205	2U (S)	S	P	All supported
N/A	4 x 2.5" S/S 8 x 2.5" S/S 4 x 2.5" NV	30°C	<= 205	2U (E)	S	P	All supported
N/A	4 x 2.5" S/S 8 x 2.5" S/S 4 x 2.5" NV	30°C	> 205	2U (S)	S	P	All supported
N/A	N/A 4 x 2.5" S/S 8 x 2.5" S/S 4 x 2.5" NV	35°C	All supported	PNCM	S	S	<= 96 GB	N/A
		35°C		PNCM	S	P	<= 128 GB	N/A
		30°C		PNCM	S	P	All supported
8 x 2.5" NVMe	N/A	30°C	All supported	T-shape (P)	N/A	P	All supported
		35°C		PNCM	N/A	S	<= 96 GB	N/A
		35°C		PNCM	N/A	P	<= 128 GB	N/A
		30°C		PNCM	N/A	P	All supported
8 x 2.5" S/S	4 x 2.5" S/S 8 x 2.5" S/S	30°C	All supported	T-shape (P)	N/A	P	All supported
		35°C		PNCM	N/A	S	<= 96 GB	N/A
		35°C		PNCM	N/A	P	<= 128 GB	N/A
		30°C		PNCM	N/A	P	All supported
8 x 2.5" NV	4 x 2.5" NV	30°C	All supported	T-shape (P)	N/A	U	All supported
		25°C		T-shape (P)	N/A	P	All supported
		35°C		PNCM	N/A	P	<= 128 GB	N/A
		30°C		PNCM	N/A	P	All supported
		30°C		PNCM	N/A	S	<= 96 GB	N/A

Table 4. Storage configurations with 12 x 3.5" front drive bays
Middle drive bays	Rear drive bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	DIMM
Middle drive bays	Rear drive bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	RDIMM (up to 32)	MRDIMM (up to 16)
N/A	N/A	35°C	<= 205	2U (E)	S	S	<= 32 GB	N/A
		35°C	<= 205	2U (E)	S	P	<= 128 GB	N/A
		30°C	<= 205	2U (E)	S	S	<= 64 GB	N/A
		30°C	<= 205	2U (E)	S	P	All supported
		35°C	> 205	2U (S)	S	P	<= 128 GB	N/A
		30°C	> 205	2U (S)	S	P	All supported
		35°C	All supported	PNCM	S	S	<= 64 GB	N/A
		35°C		PNCM	S	P	<= 128 GB	N/A
		30°C		PNCM	S	P	All supported
		25°C		PNCM	S	S	All supported
N/A	4 x 3.5" S/S 4 x 2.5" NV	30°C	<= 205	2U (E)	S	P	All supported
		30°C	> 205	2U (S)	S	P	All supported
		35°C	All supported	PNCM	S	P	<= 128 GB	N/A
		30°C	All supported	PNCM	S	P	All supported
8 x 2.5" NV	N/A	30°C	All supported	T-shape (P)	N/A	P	All supported
		35°C		PNCM	N/A	S	<= 64 GB	N/A
		35°C		PNCM	N/A	P	<= 128 GB	N/A
		30°C		PNCM	N/A	P	All supported
		25°C		PNCM	N/A	S	All supported

Table 5. Storage configurations with E3.S front bays
BP Qty.	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	DIMM
BP Qty.	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	RDIMM (up to 32)	MRDIMM (up to 16)
6/8	35°C	<= 205	2U (E)	S	P	<= 128 GB	N/A
	30°C	<= 205	2U (E)	S	P	All supported
	35°C	> 205	2U (S)	S	P	<= 128 GB	N/A
	30°C	> 205	2U (S)	S	P	All supported
8	35°C	All supported	PNCM	S	P	<= 128 GB	N/A
8	30°C	All supported	PNCM	S	P	All 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 bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	Max. GPU Qty.
Front drive bays	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	HHHL SW	FHFL SW	DW
8 x 2.5" 16 x 2.5" 24 x 2.5" Backplane-less (2.5") 8 x 3.5"	35°C	<= 205	2U (E)	S	P	10	N/A	N/A
		> 205	2U (S)	S	P	10	N/A	N/A
		All supported	T-shape (P)	GPU	P	N/A	4	2
	35°C	All supported	PNCM	S	P	9	N/A	N/A
	35°C	All supported	PNCM	GPU	P	N/A	4	2

Table 7. GPU configurations with E3.S front bays
BP Qty.	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	Max. GPU Qty.
BP Qty.	Max. Temp.	CPU TDP (W)	Heat sink	Air baffle	Fan type	HHHL SW	FHFL SW	DW
0/1/2/3/4	35°C (U fans) 30°C (P fans)	<= 205	2U (E)	S	U/P	10	N/A	N/A
		> 205	2U (S)	S	U/P	10	N/A	N/A
		All supported	T-shape (P)	GPU	U/P	N/A	4	2
	35°C	All supported	PNCM	S	P	9	N/A	N/A
	35°C	All supported	PNCM	GPU	P	N/A	4	2
6/8	35°C (U fans) 30°C (P fans)	<= 205	2U (E)	S	U/P	2	N/A	N/A
	35°C (U fans) 30°C (P fans)	> 205	2U (S)	S	U/P	2	N/A	N/A
	35°C	All supported	PNCM	S	P	2	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 bays	Max. Temp.	CPU TDP (W)	Air baffle	Fan type	Max. DIMM Qty.
8 x 2.5" 16 x 2.5" 16 x E3.S 1T 8 x E3.S 2T	35°C	All supported	S	S	16

Front drive bays

Max. Temp.

CPU TDP (W)

Air baffle

Fan type

Max. DIMM Qty.

8 x 2.5"

16 x 2.5"

16 x E3.S 1T

8 x E3.S 2T

35°C

All supported

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Thermal rules

Standard configurations​

Storage configurations​

GPU configurations​

Configurations with Compute Complex Neptune Core Module​

Standard configurations

Storage configurations

GPU configurations

Configurations with Compute Complex Neptune Core Module