Depending on the model, your computer might look slightly different from the illustration.
To remove the computer cover, see Preparing your computer and removing the computer cover.

| 1 Heat-sink-and-fan assembly | 2 Memory modules* |
| 3 Flex bays* | 4 Storage drive cage* |
| 5 Front fan assembly | 6 Storage drives* |
| 7 M.2 solid-state drives* | 8 Power supply assembly |
| 9 PCI/PCIe card* | 10 Rear fan assembly |
| 11 Cover presence switch (also called intrusion switch) |
* Configuration varies by computer models.