Thermal rules

This topic provides thermal rules for the server.

Note

Install the DIMM dummy for the empty DIMM slot.
When the server is installed with rear M.2 NVMe/SATA drive or front M.2 NVMe drive assembly, users must install an M.2 drive heat sink.
If one processor is installed, at least three fan-packs should be installed.
Users can replace the standard fans with high-performance or ultra fans for the server models not installing with Compute Complex Neptune Core Module.
Users can replace the standard heat sinks with high-performance heat sinks for all configurations.

Server models with front drive bays only (standard configuration)

This section provides thermal information for server models with front drive bays only.

Configuration	Backplane-less configuration 4 x 2.5'' NVMe/SAS/SATA 8 x 2.5'' SAS/SATA 10 x 2.5'' SAS/SATA 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay
Max. Ambient Temp. (at sea level)	45°C	35°C
CPU TDP (watts)	TDP ≤ 165	165 < TDP ≤ 210	210 < TDP ≤ 350
Heat sink	Standard	Standard	Performance
Air baffle	√	√	x
Fan type	Standard	Standard	Performance
DIMM capacity	≤ 64 GB	≤ 128 GB	≤ 256 GB
Max. DIMM Qty.	32	32	32

Configuration	8 x 2.5'' NVMe/AnyBay/U.3 10 x 2.5'' NVMe/AnyBay/U.3
Max. Ambient Temp. (at sea level)	35°C			30°C
CPU TDP (watts)	TDP ≤ 165	165 < TDP ≤ 210	210 < TDP ≤ 350	TDP ≤ 165
Heat sink	Standard	Standard	Performance	Standard
Air baffle	√	√	x	√
DIMM capacity	≤ 64 GB	≤ 256 GB	≤ 256 GB	≤ 128 GB
Fan type	Standard	Performance	Performance	Standard
Max. DIMM Qty.	32	32	32	32

Table 1. Special notes
When the server is installed with below adapters, cables, or processors with the AOC transceiver:	Follow below rules:
Transceivers (AOC ≥ 100 GbE): 100GBase-SR4 QSFP28 Transceiver	The ambient temperature must be limited to 30°C or lower and standard fan-packs must be installed. The ambient temperature must be limited to 35°C or lower and high-performance fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): Mellanox HDR IB Optical QSFP56 Cable (3m/5m/10m/15m/20m) Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable (3m/5m/10m/15m/20m) ThinkSystem NDR OSFP400 IB Multi Mode Solo-Transceiver ThinkSystem NDR/NDR200 QSFP112 IB Multi Mode Solo-Transceiver	If TruDDR5 8800MHz 64 GB (2Rx4) MRDIMM or TruDDR5 6400MHz 256 GB (4Rx4) 3DS RDIMM is installed: The ambient temperature must be limited to 25°C or lower and high-performance fan-packs must be installed. The ambient temperature must be limited to 30°C or lower and ultra fan-packs must be installed. If TruDDR5 8800MHz 64 GB (2Rx4) MRDIMM or TruDDR5 6400MHz 256 GB (4Rx4) 3DS RDIMM is not installed: The ambient temperature must be limited to 30°C or lower and high-performance fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): ThinkSystem NVIDIA ConnectX-8 8240 400GbE / 400Gb/s IB QSFP112 2-port PCIe Gen6 x16 (Generic FW)	For 10 x 2.5'' SAS/SATA/NVMe/AnyBay and 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay configuration: The ambient temperature must be limited to 25°C or lower, TDP should be between 300 and 350 Watt, and high-performance fan-packs must be installed. The ambient temperature must be limited to 30°C or lower, TDP should be limited to 300 Watt or lower, and high-performance fan-packs must be installed. For 8 x 2.5'' NVMe/AnyBay/SAS/SATA and 4 x 2.5'' NVMe/SAS/SATA configuration, the ambient temperature must be limited to 30°C or lower, TDP should be limited to 350 Watt or lower, and high-performance fan-packs must be installed.

Note

The following adapters do not support AOC ≥ 100 GbE.

ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 PCIe Ethernet Adapter
ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP Ethernet Adapter
ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

Server models with front drive bays only (E3.S configuration)

Configuration	4 x E3.S 1T / 2 x E3.S 2T 8 x E3.S 1T / 4 x E3.S 2T 12 x E3.S 1T / 6 x E3.S 2T 16 x E3.S 1T / 8 x E3.S 2T
Max. Ambient Temp. (at sea level)	35°C
CPU TDP (watts)	TDP ≤ 165	165 < TDP ≤ 350
Heat sink	Standard	Performance
Air baffle	√	x
DIMM capacity	≤ 256 GB	≤ 256 GB
Fan type	Performance	Performance
Max. DIMM Qty.	32	32

Note

For the special notes about adapters, cables, or processors with the AOC transceiver, see Table 1.
The following adapters do not support AOC ≥ 100 GbE.
- ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 PCIe Ethernet Adapter
- ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP Ethernet Adapter
- ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

Server models with front and rear drive bays

This section provides thermal information for server models with front and rear drive bays.

Configuration (Front)	10 x 2.5'' NVMe/SAS/SATA/AnyBay/U.3
Configuration (Rear)	2 x 2.5'' NVMe/U.3 2 x 2.5'' SAS/SATA SSD 2 x 2.5'' SAS/SATA HDD		2 x 2.5'' NVMe/U.3 2 x 2.5'' SAS/SATA SSD
Max. Ambient Temp. (at sea level)	35°C		30°C
CPU TDP (watts)	TDP ≤ 210	210 ≤ TDP ≤ 225	225 < TDP ≤ 250	250 < TDP ≤ 300
Heat sink	Standard	Performance	Performance	Performance
Air baffle	√	x	x	x
Fan type	Performance	Performance	Performance	Performance
DIMM capacity	≤ 256 GB	≤ 256 GB	≤ 256 GB	≤ 256 GB
Max. DIMM Qty.	32	32	32	32

Configuration (Front)	10 x 2.5'' NVMe/U.3
Configuration (Rear)	2 x 2.5'' NVMe/U.3
Max. Ambient Temp. (at sea level)	30°C	25°C
CPU TDP (watts)	300 < TDP ≤ 350	300 < TDP ≤ 350
Heat sink	Performance	Performance
Air baffle	x	x
Fan type	Ultra	Performance
DIMM capacity	≤ 128 GB	≤ 128 GB
Max. DIMM Qty.	32	32

Note

For the special notes about adapters, cables, or processors with the AOC transceiver, see Table 1.
The following adapters do not support AOC ≥ 100 GbE.
- ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 PCIe Ethernet Adapter
- ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP Ethernet Adapter
- ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

Server models with GPUs

This section provides thermal information for server models installed with GPUs.

Configuration	4 x E3.S 1T / 2 x E3.S 2T 8 x E3.S 1T / 4 x E3.S 2T 12 x E3.S 1T / 6 x E3.S 2T 16 x E3.S 1T / 8 x E3.S 2T Backplane-less configuration 4 x 2.5" SAS/SATA/NVMe 8 x 2.5" NVMe/SAS/SATA/AnyBay/U.3 10 x 2.5" NVMe/SAS/SATA/AnyBay/U.3 6 x 2.5" SAS/SATA + 4 x 2.5 AnyBay			Backplane-less configuration 4 x 2.5" SAS/SATA/NVMe 8 x 2.5" NVMe/SAS/SATA/AnyBay/U.3 10 x 2.5" NVMe/SAS/SATA/AnyBay/U.3 6 x 2.5" SAS/SATA + 4 x 2.5 AnyBay
Max. Ambient Temp. (at sea level)	30°C
CPU TDP (watts)	TDP ≤ 165	165 < TDP ≤ 300	300 < TDP ≤ 350	165 ≤ TDP ≤ 210
Heat sink	Standard	Performance	Performance	Standard
Air baffle	√	x	x	√
Fan type	Performance	Performance	Performance	Performance
DIMM capacity	≤ 256 GB	≤ 256 GB	≤ 256 GB	≤ 256 GB
Max. GPU Qty.	3	3	2	3
Max. DIMM Qty.	32	32	32	32

Note

For the special notes about adapters, cables, or processors with the AOC transceiver, see Table 1.
The following adapters do not support AOC ≥ 100 GbE.
- ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 PCIe Ethernet Adapter
- ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP Ethernet Adapter
- ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

Server models with NeptAir module

This section provides thermal information for server models installed with the Processor Neptune Air Module (NeptAir).

Configuration ^Note1,2	Backplane-less configuration 4 x 2.5'' NVMe/SAS/SATA 8 x 2.5'' NVMe/SAS/SATA/AnyBay/U.3 10 x 2.5'' NVMe/SAS/SATA/AnyBay/U.3 6 x 2.5" SAS/SATA + 4 x 2.5 AnyBay 4 x E3.S 1T / 2 x E3.S 2T 8 x E3.S 1T / 4 x E3.S 2T 12 x E3.S 1T / 6 x E3.S 2T 16 x E3.S 1T / 8 x E3.S 2T
Max. Ambient Temp. (at sea level)	35°C
CPU TDP (watts)	TDP ≤ 165	165 ＜ TDP ≤ 350	300 ＜ TDP ≤ 350
Heat sink	Processor Neptune Air Module (NeptAir)
Air baffle	x	x	x
Fan type	Performance	Performance	Ultra
DIMM capacity	≤ 256 GB	≤ 128 GB	≤ 256 GB
Max. DIMM Qty.	32	32	32

Table 2. Special notes
When the server is installed with below adapters, cables, or processors with the AOC transceiver:	Follow below rules:
Transceivers (AOC ≥ 100 GbE): 100GBase-SR4 QSFP28 Transceiver	The ambient temperature must be limited to 30°C or lower and high-performance fan-packs must be installed. The ambient temperature must be limited to 35°C or lower and ultra fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): Mellanox HDR IB Optical QSFP56 Cable (3m/5m/10m/15m/20m) Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable (3m/5m/10m/15m/20m) ThinkSystem NDR OSFP400 IB Multi Mode Solo-Transceiver ThinkSystem NDR/NDR200 QSFP112 IB Multi Mode Solo-Transceiver	If TruDDR5 8800MHz 64 GB (2Rx4) MRDIMM or TruDDR5 6400MHz 256 GB (4Rx4) 3DS RDIMM is installed: The ambient temperature must be limited to 25°C or lower and high-performance fan-packs must be installed. The ambient temperature must be limited to 30°C or lower and ultra fan-packs must be installed. If TruDDR5 8800MHz 64 GB (2Rx4) MRDIMM or TruDDR5 6400MHz 256 GB (4Rx4) 3DS RDIMM is not installed: The ambient temperature must be limited to 30°C or lower and high-performance fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): ThinkSystem NVIDIA ConnectX-8 8240 400GbE / 400Gb/s IB QSFP112 2-port PCIe Gen6 x16 (Generic FW)	For 10 x 2.5'' SAS/SATA/NVMe/AnyBay, 6 x 2.5'' SAS/SATA + 4 x 2.5'' AnyBay, and 16 x E3.S 1T / 8 x E3.S 2T configuration: The ambient temperature must be limited to 25°C or lower, TDP should be limited to 350 Watt or lower, and high-performance fan-packs must be installed. The ambient temperature must be limited to 30°C or lower, TDP should be limited to 350 Watt or lower, and ultra fan-packs must be installed. The ambient temperature must be limited to 30°C or lower, TDP should be limited to 300 Watt or lower, and high-performance fan-packs must be installed. For 8 x 2.5'' NVMe/AnyBay/SAS/SATA, 4 x 2.5'' NVMe/SAS/SATA, 4 x E3.S 1T / 2 x E3.S 2T, 8 x E3.S 1T / 4 x E3.S 2T, 12 x E3.S 1T / 6 x E3.S 2T, configuration, the ambient temperature must be limited to 30°C or lower, TDP should be limited to 350 Watt or lower, and high-performance fan-packs must be installed.
Processor 6732P	The standard heat sinks or high-performance heat sinks cannot be installed.

Note

For the special notes about adapters, cables, or processors with the AOC transceiver, see Table 1.

Server models with NeptCore module

This section provides thermal information for server models installed with the Processor Neptune Core Module.

Configuration	Backplane-less configuration 4 x 2.5'' NVMe/SAS/SATA 8 x 2.5'' NVMe/SAS/SATA/AnyBay/U.3 10 x 2.5'' NVMe/SAS/SATA/AnyBay/U.3 6 x 2.5" SAS/SATA + 4 x 2.5 AnyBay 4 x E3.S 1T / 2 x E3.S 2T 8 x E3.S 1T / 4 x E3.S 2T 12 x E3.S 1T / 6 x E3.S 2T 16 x E3.S 1T / 8 x E3.S 2T
CPU TDP (watts)	TDP ≤ 350
Max. Ambient Temp. (at sea level)	35°C
Max. Liquid¹ inlet Temp. (at sea level)	45°C
Heat sink	Processor Neptune Core Module
Air baffle	x
Fan type	Standard ²
DIMM capacity	≤ 256 GB
Max. DIMM Qty.	32

Note

The liquid flow rate for de-ionized water should be no less than 0.5 liters per minute (lpm).
When the server is installed with rear M.2 NVMe/SATA drive or front M.2 NVMe drive assembly, users must install an M.2 drive heat sink.

When the server is installed with below adapters or memory with the AOC transceiver:	Follow below rules:
Transceivers (AOC ≥ 100 GbE): 100GBase-SR4 QSFP28 Transceiver	The ambient temperature must be limited to 35°C or lower and standard fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): Mellanox HDR IB Optical QSFP56 Cable (3m/5m/10m/15m/20m) Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable (3m/5m/10m/15m/20m) ThinkSystem NDR OSFP400 IB Multi Mode Solo-Transceiver ThinkSystem NDR/NDR200 QSFP112 IB Multi Mode Solo-Transceiver	If TruDDR5 8800MHz 64 GB (2Rx4) MRDIMM or TruDDR5 6400MHz 256 GB (4Rx4) 3DS RDIMM is installed: The ambient temperature must be limited to 30°C or lower and standard fan-packs must be installed. The ambient temperature must be limited to 35°C or lower and high-performance fan-packs must be installed. If TruDDR5 8800MHz 64 GB (2Rx4) MRDIMM or TruDDR5 6400MHz 256 GB (4Rx4) 3DS RDIMM is not installed: The ambient temperature must be limited to 35°C or lower and standard fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): ThinkSystem NVIDIA ConnectX-8 8240 400GbE / 400Gb/s IB QSFP112 2-port PCIe Gen6 x16 (Generic FW)	The ambient temperature must be limited to 35°C or lower and standard fan-packs must be installed.
Processor 6732P	The standard heat sinks or high-performance heat sinks cannot be installed.

Note

The following adapters do not support AOC ≥ 100 GbE.

ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 PCIe Ethernet Adapter
ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP Ethernet Adapter
ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

Server models with Compute Complex Neptune Core Module

This section provides thermal information for server models installed with the Compute Complex Neptune Core Module.

Configuration	Backplane-less configuration 4 x 2.5'' NVMe/SAS/SATA 8 x 2.5'' NVMe/SAS/SATA/U.3 10 x 2.5'' NVMe/SAS/SATA/U.3 4 x E3.S 1T 8 x E3.S 1T 12 x E3.S 1T
CPU TDP (watts)	TDP ≤ 350
Max. Ambient Temp. (at sea level)	35°C
Max. Liquid¹ inlet Temp. (at sea level)	45°C
Heat sink	Compute Complex Neptune Core Module
Air baffle	x
Fan type	Standard ²
DIMM capacity	≤ 256 GB
Max. DIMM Qty.	16

Note

The liquid flow rate for de-ionized water should be no less than 0.5 liters per minute (lpm).
When the server is installed with rear M.2 NVMe/SATA drive or front M.2 NVMe drive assembly, users must install an M.2 drive heat sink.

When the server is installed with below adapters with the AOC transceiver:	Follow below rules:
Transceivers (AOC ≥ 100 GbE): 100GBase-SR4 QSFP28 Transceiver	The ambient temperature must be limited to 35°C or lower and standard fan-packs must be installed.
Transceivers (AOC ≥ 100 GbE): Mellanox HDR IB Optical QSFP56 Cable (3m/5m/10m/15m/20m) Mellanox HDR IB to 2x HDR100 Splitter Optical QSFP56 Cable (3m/5m/10m/15m/20m) ThinkSystem NDR OSFP400 IB Multi Mode Solo-Transceiver ThinkSystem NDR/NDR200 QSFP112 IB Multi Mode Solo-Transceiver	The ambient temperature must be limited to 30°C or lower.
Transceivers (AOC ≥ 100 GbE): ThinkSystem NVIDIA ConnectX-8 8240 400GbE / 400Gb/s IB QSFP112 2-port PCIe Gen6 x16 (Generic FW)	The ambient temperature must be limited to 35°C or lower and standard fan-packs must be installed.
Processor 6732P	The standard heat sinks or high-performance heat sinks cannot be installed.

Note

The following adapters do not support AOC ≥ 100 GbE.

ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 PCIe Ethernet Adapter
ThinkSystem Broadcom 57608 2x200/1x400GbE QSFP112 OCP Ethernet Adapter
ThinkSystem NVIDIA ConnectX-8 8180 800Gbs XDR IB / 2x400GbE OSFP 1-port PCIe Gen6 x16 (Generic FW)

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Thermal rules

Server models with front drive bays only (standard configuration)​

Server models with front drive bays only (E3.S configuration)​

Server models with front and rear drive bays​

Server models with GPUs​

Server models with NeptAir module​

Server models with NeptCore module​

Server models with Compute Complex Neptune Core Module​

Server models with front drive bays only (standard configuration)

Server models with front drive bays only (E3.S configuration)

Server models with front and rear drive bays

Server models with GPUs

Server models with NeptAir module

Server models with NeptCore module

Server models with Compute Complex Neptune Core Module