Lenovo ThinkSystem SR650 V2 Maintenance Manual page 85

Riser card 3 power and sideband connection
The power and sideband connections for x8/x8 PCIe riser card 3 and x16/x16 PCIe riser card 3 are the same.
Figure 18. Riser card 3 power and sideband connection
From
Power connector on the riser card
1
Sideband connector on the riser card
2
To
Riser 3 power connector on the system board
Riser 3 sideband on the system board
Chapter 3
.
Internal cable routing
75