PCIe riser cards
See this section to identify parts that are enclosed in the PCIe riser card kits.
PCIe slot 5 to 7 is available for: 
•  “x16/x16 (x8 lanes) FH/HL PCIe riser kit” on page 140
•  “x16/x16/x16 PCIe riser kit” on page 141
x16/x16 (x8 lanes) FH/HL PCIe riser kit
See this section to identify parts that are enclosed in the x16/x16 (x8 lanes) FH/HL PCIe riser kit.
Figure 41. x16/x16 (x8 lanes) FH/HL PCIe riser kit
1  x16/x16 (x8 lanes) FH/HL PCIe riser card
See the following to identify connectors on the riser cards.
Figure 42. x16/x16 (x8 lanes) PCIe riser card connectors
Table 19.  x16/x16 (x8 lanes) PCIe riser card connectors
1  PCIe full-height riser 3  PCI Express 3.0 x16 (x8 lane) (Slot 2)
2  PCI Express 3.0 x16 (x8 lane) (Slot 1)
Follow the instructions in “Install the PCIe riser assembly” on page 190 to learn how to install the option kit.
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ThinkSystem SR860 V2Setup Guide