Table 5. System-board connectors
1 Connector for power button with LED 2 Mono amplifier (speaker) connector
3 System power connector 4 SATA power 1 connector
5 SATA power 2 connector 6 SATA 2 connector
7 M.2 drive 2 connector
8 SATA 1 connector
9 Thermal sensor connector
10 PCIe slot 3*
11 CMOS battery (CR2032) 12 PCIe slot 1
13 M.2 drive 1 connector
14 Rear fan connector
15 Processor power connector 16 Processor socket
17 Processor fan connector
18 DIMM slot 1
19 DIMM slot 2
20 Front fan connector
* Currently, there is no PCIe adapter supported in this PCIe x1 slot. Go through the sales channel for
additional requests.
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ThinkSystem ST45 V3 User Guide