NEC Express5800 Series Maintenance Manual page 134

Chapter 2 Configuring and Upgrading the System
15. Place the heat sink on the CPU.
134
Important Do not touch the cooling sheet that is attached on the back of the heat sink with your
hand.
Important If you install additional CPU, ensure that the fins of the additional CPU's heat sink
are in the same direction as those of the standard CPU.
Front of server
Express5800/R320c-E4, R320c-M4 Maintenance Guide (VMware)
5. Installing Optional Devices
Heat sink of
additional CPU
Heat sink of
standard CPU