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Precision 3640 Tower Service Manual

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System board layout

This topic illustrates the system board layout and calls out the ports and connectors on the system board.

System board layout

  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
  28. M.2 2230 PCIe x1 slot, keyed E for WiFi and Bluetooth card

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