You've filled Riser positions 1 and 2 already and you still need two more full-width Gen4 slots in your SR665. This is the Riser 3 Option Kit v2. Two dedicated x16 PCIe Gen4 lanes, no sharing, no half-lane compromises. Drop in your second pair of GPUs or high-throughput NICs and you're running. Genuine LENOVO ISG part 4XH7A61083
| 0 | ThinkSystem SR665 |
| brand | LENOVO ISG |
| part_number | 4XH7A61083 |
| category | SERVERS |
| subcategory | LENOVO CABLE KITS |
| pcie_generation | Gen4 |
| lane_configuration | x16/x16 |
| riser_position | 3 |
| kit_version | v2 |