ThinkSystem SR665 x16/x16 PCIe G4 Riser3 option kit
The option package contains the following items.

1 x16/x16 PCIe Riser3 option kit
2 One power cable, from Riser3 Pwr (MB) to Power (Riser3)
3 One cable for Sideband for Riser3
4 One signal cable for PCIe G4, from PCIe1 (MB) and PCIe2 (MB) to MCIO 1 (Riser3)
5 One signal cable for PCIe G4, from PCIe7 (MB) to MCIO 2 (Riser3)
6 One signal cable for PCIe G4, from PCIe8 (MB) to MCIO 3 (Riser3)
7 One signal cable for PCIe G4, from PCIe3 (MB) to MCIO 4 (Riser3)
For information about installing the option, refer to “Server hardware setup” chapter in Setup Guide. The most up-to-date Setup Guide is always available for download at http://thinksystem.lenovofiles.com/help/index.jsp.
To get the latest technical information and download device drivers and updates, go to https://datacentersupport.lenovo.com/.