You need more PCIe lanes in your SR650 V2 or SR665 and you want Gen 4 speed, not a bottlenecked Gen 3 path. This riser gives you one x16 slot and two x8 slots on the same card — room for a dual-port NIC, an HBA, and a GPU without sacrificing bandwidth. Drop it into the Riser 1/2 slot, seat your cards, done. v2 revision means it matches the current chassis form factor
| 0 | ThinkSystem SR650 V2 |
| 1 | ThinkSystem SR665 |
| brand | LENOVO ISG |
| category | SERVERS |
| subcategory | LENOVO RISER CARDS |
| pci_e_generation | Gen 4 |
| slot_configuration | x16/x8/x8 |
| riser_position | Riser 1/2 |
| revision | v2 |
| kit_type | Riser Card Option Kit |