Riser 3/4 cage
Use this section to understand the cable routing for the riser 3/4 cage, which provide four low-profile (4LP) PCIe slots.
The following illustration shows the 4LP PCIe riser 3/4 cage. The riser card types vary by server model. For detailed information, see PCIe slots and PCIe adapters.
![](sr650v3-367-4lprisercage-200.png)
![](sr650v3-367-4lprisercage-200.png)
Power and sideband cable routing
The following illustration shows the power and sideband connections for x8/x8 PCIe riser 3 card and x8/x8 PCIe riser 4 card.
Figure 1. Riser 3/4 card power and sideband cable routing
![Riser 3/4 card power and sideband connection](sr650v3-382-4lprisercage-pwr-600.png)
![Riser 3/4 card power and sideband connection](sr650v3-382-4lprisercage-pwr-600.png)
From | To |
---|---|
1 Power connector on the riser cards | Riser 3 power connector on the system board assembly |
2 Sideband connector on the riser cards | Riser 3 sideband on the system board assembly |
Signal cable connection
The following illustration shows the signal connections for x8/x8 PCIe riser 3 card and x8/x8 PCIe riser 4 card.
Figure 2. Cable routing in configurations without riser 5 and front OCP module
![Cable routing in configurations without riser 5 and front OCP module](sr650v3-423-4lprisercage-signal-300.png)
![Cable routing in configurations without riser 5 and front OCP module](sr650v3-423-4lprisercage-signal-300.png)
From | To |
---|---|
1 Swift connector 1 on riser 3 card | Onboard: PCIe 1 |
2 Swift connector 2 on riser 3 card | Onboard: PCIe 2 |
3 Swift connector 1 on riser 4 card | Onboard: PCIe 9 |
4 Swift connector 2 on riser 4 card | Onboard: PCIe 10 |
Figure 3. Cable routing in configurations with riser 5 and front OCP module when two processors are installed
![Cable routing in configurations with riser 5 and front OCP module](sr650v3-485-4lp-fio-300.png)
![Cable routing in configurations with riser 5 and front OCP module](sr650v3-485-4lp-fio-300.png)
From | To |
---|---|
1 Swift connector 1 on riser 3 card | Onboard: PCIe 7 |
2 Swift connector 2 on riser 3 card | Onboard: PCIe 8 |
3 Swift connector 1 on riser 4 card | Onboard: PCIe 9 |
4 Swift connector 2 on riser 4 card | Onboard: PCIe 10 |
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