Lenovo ThinkEdge SE455 V3 User Manual page 237

Two types of PCIe riser cards are supported in this server:
PCIe riser 1 riser card
See this section to locate the connectors on the PCIe riser 1 riser card.
MCIO 2 connector
1
MCIO 1 connector
2
Figure 203. PCIe riser 1 riser card
PCIe x16 (Gen5 x16) slot
1
PCIe x16 (Gen4 x8) slot
2
PCIe x16 (Gen4 x8) slot
3
MCIO 3 connector
4
MCIO 4 connector
5
Figure 204. PCIe riser 1 riser card
PCIe riser 2 riser card
See this section to locate the connectors on the PCIe riser 2 riser card.
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Chapter 6 Internal cable routing 229