System board connectors
See this section to identify the connectors on the system board.
Figure 1. System board connectors
| 1 Serial connector | 15 Fan connectors |
| 2 VGA connector | 16 Processor and memory expansion tray power connector |
| 3 Two USB 3.1 | 17 Power backplane sideband connector |
| 4 XClarity Controllernetwork connector | 18 Front VGA connector |
| 5 NMI button | 19 Power backplane power connector |
| 6 TCM/TPM module | 20 PCIe signal connector 1 |
| 7 PCIe riser connector (PCIe slot 5 to 7) | 21 M.2 backplane power connector |
| 8 PCIe slot 8 (OCP connector) | 22 On-board SATA connector |
| 9 USB front panel module connector | 23 PCIe slot 13 (x16) |
| 10 PCIe signal connector 2 | 24 PCIe slot 14 (x8) |
| 11 UPI connectors | 25 PCIe slot 15 (x8) |
| 12 Processor and memory expansion tray power connector | 26 Intrusion switch connector |
| 13 LCD diagnostics panel connector | 27 7mm drive/M.2 signal connector |
| 14 Drive backplane power connectors | 28 7mm drive power connector |
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