System board connectors
The following illustration shows the internal connectors on the system board.
Figure 1. System board connectors
| 1 M.2 slot 1 / M.2 slot 2 | 2 PCIe riser 2 power and sideband connector |
| 3 PCIe riser 3 power and sideband connector | 4 MCIO connector 4 / PCIe riser 2 signal connector / Rear drive backplane signal connector |
| 5 PCIe riser 1 power and sideband connector | 6 MCIO connector 8 / PCIe riser 1 signal connector / PCIe riser 3 signal connector |
| 7 System I/O board connector (DC-SCM) | 8 PDB_0V connector (PSU_GND) |
| 9 PDB_P12V connector (PSU_P12V) | 10 MCIO connector 7 |
| 11 Integrated diagnostics panel connector | 12 MCIO connector 6 |
| 13 MCIO connector 5 | 14 MCIO connector 10 |
| 15 CPU leakage sensor module connector | 16 MCIO connector 3 |
| 17 MCIO connector 2 | 18 MCIO connector 1 |
| 19 MCIO connector 9 | 20 PCIe switch sideband connector |
| 21 Front USB / Mini DisplayPort connector |
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