Riser cards
Use this section to understand the cable routing for riser cards.
When there is only one processor installed, six system fans are needed if a middle drive cage, rear drive cage, or riser 3 is installed.
The riser card types vary by server model. For detailed information, see PCIe slots and PCIe adapters.
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.
| From | To |
|---|---|
| 1 Power connector on the riser card | Riser 3 power connector on the system board |
| 2 Sideband connector on the riser card | Riser 3 sideband on the system board |
Riser card 3 (x8/x8 PCIe) signal cable connection for one processor
The following illustration shows the signal cable connections for the x8/x8 PCIe riser card 3 when only one processor is installed.
ThinkSystem SR650 V2 PCIe G4 x8/x8 Riser 3 Option Kit
ThinkSystem SR650 V2 x8/x8 PCIe G4 Riser3 Cable Kit for CPU1
| From | To |
|---|---|
| 1 MCIO 1 on the riser card | PCIe connector 2 on the system board |
| 2 MCIO 2 on the riser card | PCIe connector 1 on the system board |
Riser card 3 (x8/x8 PCIe) signal cable connection for two processors
The following illustration shows the signal cable connections for the x8/x8 PCIe riser card 3 when two processors are installed.
The below option kit is needed when you want to add the x8/x8 PCIe riser card 3 if your server comes with two processors and no riser 3:
ThinkSystem SR650 V2 PCIe G4 x8/x8 Riser 3 Option Kit
The below option kit is needed when you want to add a second processor if your server comes with one processor and the x8/x8 PCIe riser card 3:
ThinkSystem SR650 V2 x8/x8 PCIe G4 Riser3 Cable Kit for CPU1
 | For configuration with 32 NVMe drives  | ||
| From | To | From | To |
| 1 MCIO 1 on the riser card | PCIe connector 2 on the system board | 1 MCIO 1 on the riser card | PCIe connector 2 on the system board |
| 2 MCIO 2 on the riser card | PCIe connector 5 on the system board | 2 MCIO 2 on the riser card | PCIe connector 5 on the system board |
Riser card 3 (x16/x16 PCIe) signal cable connection for one processor
The following illustration shows the signal cable connections for the x16/x16 PCIe riser card 3 when only one processor is installed.
ThinkSystem SR650 V2 PCIe G4 x16/x16 Riser3 Option Kit
| From | To |
|---|---|
| 1 MCIO 1 on the riser card | PCIe connector 2 on the system board |
| 2 MCIO 4 on the riser card | PCIe connector 1 on the system board |
Riser card 3 (x16/x16 PCIe) signal cable connection for two processors
The following illustration shows the signal cable connections for the x16/x16 PCIe riser card 3 when two processors are installed.
The below option kit is needed when you want to add the x16/x16 PCIe riser card 3 if your server comes with two processors and no riser 3:
ThinkSystem SR650 V2 PCIe G4 x16/x16 Riser3 Option Kit
The below option kit is needed when you want to add a second processor if your server comes with one processor and the x16/x16 PCIe riser card 3:
ThinkSystem SR650 V2 x16/x16 PCIe G4 Riser3 Cable Kit for CPU1
 | For configuration with 32 NVMe drives  | ||
| From | To | From | To |
| 1 MCIO 1 and MCIO 4 on the riser card | PCIe connectors 1 and 2 respectively on the system board | 1 MCIO 1 on the riser card | PCIe connector 2 on the system board |
| 2 MCIO 2 and MCIO 3 on the riser card | PCIe connectors 5 and 6 respectively on the system board | 2 MCIO 2 and MCIO 3 on the riser card | PCIe connectors 5 and 6 respectively on the system board |
| 3 MCIO 4 on the riser card | PCIe connectors 1 on the system board | ||