Dell Precision 3640 Tower - System board layout

System board layout
This topic illustrates the system board layout and calls out the ports and connectors on the system board.
1. Optional I/O card connector
2. ATX PSU power connector : ATX CPU
3. CPU socket
4. Coin-cell battery
5. Memory module connector
6. Top-fan connector
7. Intrusion switch connector
8. Power button module connector: PWR SW
9. ATX PSU power connector : ATX SYS
10. SD Card reader connector
11. Front panel USB Type-C connector
12. Front panel USB Type-A connector
13. SATA 3.0 data connector : SATA0
14. SATA 3.0 data connector : SATA1
15. SATA 3.0 data connector : SATA2 and 3
16. M.2 2280 PCIe x4, keyed M for solid-state drive
17. Front fan connector
18. CAC_PIV/BT connector
19. M.2 2280 PCIe x4/SATA, keyed M for solid-state drive
20. PWR_BTN
21. System fan connector: HDD FAN
22. Front panel audio connector
23. Internal Speaker
24. Full Height PCIe x4 slot (open-ended)
25. PCI-32 slot
26. Full Height PCIe x16 slot
27. CPU Fan connector
Disassembly and reassembly
95