Dell Precision 7920 Tower - Back View

Back view
1. Power supply unit 2. Line-out port
3. Microphone/Line-in port 4. Serial port
5. PS/2 Mouse port 6. PSU BIST LED
7. PS/2 Keyboard port 8. Network Port (AMT Enabled - Optional)
9. Network Port 10. USB 3.1 Gen 1 ports
11. USB 3.1 Gen 1 Type-C port with PowerShare 12. Mechanical expansion slot
13. PCIe expansion slots 14. Side cover release latch
15. PCIe expansion slots (CPU1 required)
8 Chassis