You need three more PCIe slots on your SR650/a V4 and the cage that holds Riser 2 or Riser 3 is missing, damaged, or you're building a new unit from spare parts. This is that cage. It's the structural housing that takes a three-slot PCIe riser and locks it into the SR650/a V4 chassis so your cards stay seated at full vibration and thermal load. Not a bracket. Not an adapter. The actual cage Lenovo specifies for Riser 2 or Riser 3 installation. You get it in, you drop the riser in, you screw it down, three slots are live
| brand | LENOVO ISG |
| category | SERVERS |
| subcategory | LENOVO RISER CARDS |
| compatible_system | Lenovo ThinkSystem SR650/a V4 |
| riser_compatibility | Riser 2 or Riser 3 |
| pcie_slots | 3x |
| component_type | Riser Cage |
