Dell EMC PowerEdge R940 Installation And Service Manual page 36

Figure 25. Inside the system — Four processor system with processor expansion module (PEM)
1. hard drive/SSD backplane with expander board
3. air shroud
5. left expansion card riser
7. network daughter card riser
9. processor expansion module (PEM)
11. heat sink (CPU4)
13. NVDIMM-N battery
36 Installing and removing system components
2. cooling fan (8)
4. heat sink (CPU3)
6. storage controller card
8. system board
10. right expansion card riser
12. memory module (48)
14. information tag