CPU, heat sink, and fan combinations

8 x 3.5''/ 8 x 2.5''/16 x 2.5'' models

CPU group	Config.	Heat sink	Fan
C/B	GPUs Mellanox ConnectX-6 100 GbE/200 GbE AOC Xilinx Alveo U25 FPGA Xilinx Alveo U50 FPGA 256 GB 3DS RDIMMs	1U Aluminium	Performance
C/B	All other configurations	1U Aluminium	Standard
A	Double-wide GPUs	1U Aluminium	Performance
	Single-wide GPUs Mellanox ConnectX-6 100 GbE/200 GbE AOC Xilinx Alveo U25 FPGA Xilinx Alveo U50 FPGA 256 GB 3DS RDIMMs	2U Standard	Performance
	All other configurations	2U Standard	Standard
D/Z/X	GPUs Mellanox ConnectX-6 100 GbE/200 GbE AOC Xilinx Alveo U25 FPGA Xilinx Alveo U50 FPGA 256 GB 3DS RDIMMs	2U Performance	Performance
D/Z/X	All other configurations	2U Performance	Standard

24 x 2.5''/12 x 3.5'' models

CPU group	Config.	Heat sink	Fan
C/B/A	P620 GPU Mellanox ConnectX-6 100 GbE/200 GbE AOC Xilinx Alveo U25 FPGA Xilinx Alveo U50 FPGA Broadcom 57454 10GBASE-T 4-port OCP	2U Standard	Performance
	Mid bays	1U Aluminium	Performance
	All other configurations	2U Standard	Standard
D/Z/X	P620 GPU Mellanox ConnectX-6 100 GbE/200 GbE AOC Xilinx Alveo U25 FPGA Xilinx Alveo U50 FPGA Broadcom 57454 10GBASE-T 4-port OCP	2U Performance	Performance
D/Z/X	All other configurations	2U Performance	Standard

Note

Under all of the following conditions, standard fans can be used. Otherwise, performance fans are required.
- No GPUs
- No Mellanox ConnectX-6 100 GbE/200 GbE with AOC
- No Xilinx Alveo U25 FPGA
- No Xilinx Alveo U50 FPGA
- No Broadcom 57454 10GBASE-T 4-port OCP
- No 256 GB 3DS RDIMMs
- No middle drive bays or rear drive bays
The following configurations require six fans:
- two-processor configurations
- one-processor configurations with middle drives, rear drives, or riser 3
If there is an OCP 3.0 Ethernet adapter installed, when the system is powered off but still plugged in to AC power, fans 5 and fan 6 will continue to spin at a much lower speed. This is the system design to provide proper cooling for the OCP 3.0 Ethernet adapter.

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