Dell Precision T3600 (Mid 2012) - Manual (Page 36)

1. PCI slot 2. PCIe x16 slot (wired as x4)
3. PCIe x16 slot 4. PCIe x1 slot
5. PCIe x16 slot (accelerated graphics port) 6. PCIe x16 slot (wired as x4)
7. USB 3.0 front panel connector 8. DIMM slots
9. intrusion switch connector 10. CPU fan socket
11. CPU 12. DIMM slots
13. hard drive temperature sensor 14. front panel audio connector
15. HDD1 fan connector 16. coin-cell battery
17. system fan 1 connector 18. remote power enable
19. HDD temperature sensor connector 20. system fan 2 connector
21. system fan 3 connector 22. PSWD jumper
23. front panel & USB 2.0 connector 24. internal speaker connector
25. internal USB 2.0 connector 26. HDD & optical drive connectors
27. RTCRST jumper 28. 24–pin power connector
29. internal USB 2.0 connector 30. CPU power connector
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