NEC Express5800/R320d-M4 User Manual page 54

Chapter 1 General Description
The figure below shows internal view of CPU/IO module without ducts.
(1)
(1) HDD BP(Backplane)
(2) Cooling fan
(3) Processor (CPU)
(4) DIMM
(5) CPU/IO board
(6) PCI Riser card
(7) Power unit
Express5800/R320c-E4, R320c-M4, R320d-E4, R320d-M4 User's Guide
54
(2) (3)
Mounted below the heat sink.
Option
R320c-M4, R320d-M4 only
4. Names and Functions of Components
(4) (5) (6) (7)