CPU, heat sink, and fan combinations

4 x 2.5'' models

CPU group	Config.	Heat sink	Fan
Z/X	All configurations	Performance	Performance

8 x 2.5''/4 x 3.5'' models

CPU group	Config.	Heat sink	Fan
C	Non Mellanox ConnextX-6 NIC	Aluminum	Standard
	All other configurations	Aluminum	Performance
B	Non Mellanox ConnextX-6 NIC	Aluminum	Standard
	All other configurations	Aluminum	Performance
A	All configurations	Standard	Performance
D	All configurations	Performance	Performance

10 x 2.5'' models

CPU group	Config.	Heat sink	Fan
C	Non Mellanox ConnextX-6 NIC	Aluminum	Standard
	All other configurations	Aluminum	Performance
B	All configurations	Aluminum	Performance
A	All configurations	Standard	Performance
D	All configurations	Performance	Performance

Note

• One CPU requires 6 fans (slot 1–6) and 2 fan dummies(7–8); two CPUs require 8 fans(slot 1–8).

• 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.