System-board connectors

The following illustrations show the internal connectors on the system board.

Table 1. System-board connectors

1 MicroSD card socket	17 PDB auxiliary power connector
2 Drive backplane or front I/O sideband connector	18 Riser power connector
3 Firmware and RoT security module connector	19 Riser slot 1 connector
4 (Reserved)	20 Processor socket
5 OCP power and sideband connector	21 Memory module slots 1-12
6 OCP connector	22 Rear I/O connector
7 Power bus bar connector	23 M.2 bay 2
8 Drive backplane power connector	24 M.2 bay 3
9 Fan 1 connector	25 SATA 0-5 connector
10 Fan 2 connector	26 NVMe 4-5 connector
11 Fan 3 connector	27 CMOS battery socket
12 RAID power connector	28 (Reserved)
13 Fan 4 connector	29 NVMe 2-3 connector
14 RAID signal connector	30 NVMe 0-1 connector
15 M.2 boot adapter connector	31 Inlet temperature sensor connector
16 PDB sideband connector