Choose an OCuLink cable by matching SFF-8611 or SFF-8612, 4i or 8i lanes, connector direction, shielding, PCIe generation, and the shortest length that fits the routing path.
Confirm the host platform, target device, connector family, lane configuration, PCIe generation, mechanical clearance, cable length, and validation requirements before ordering.
Use the LetLinkSo catalog and B2B inquiry form to match the correct cable or adapter card for your project.
For an eGPU or GPU dock, start by confirming the host-side connector and whether the cable path uses OCuLink SFF-8611. For an NVMe or server build, confirm the device-side SFF-8612 or SFF-8611 interface, 4i or 8i lane configuration, PCIe generation, and required length. The connector name alone is not enough to guarantee compatibility.
Compare OCuLink SFF-8611 4i cable, OCuLink SFF-8612 adapter card, or the OCuLink connectivity solution, then request a B2B quote.
| Application | What to verify | Recommended path |
|---|---|---|
| eGPU or GPU dock | Host connector, SFF-8611 cable end, lane count, clearance, and external routing | OCuLink connectivity |
| NVMe expansion | SFF-8611/SFF-8612 direction, SSD interface, PCIe generation, and power design | OCuLink adapter cards |
| Server or backplane | 4i/8i lane configuration, cable length, shielding, bend radius, and validation | OCuLink cable assemblies |
Measure the installed cable route rather than the straight-line distance between ports. Include connector clearance, the permitted bend path, retention hardware, and enough service length for installation. For a high-speed PCIe link, a longer cable is not automatically better: use the shortest assembly that reaches cleanly, then validate it in the target host and device configuration.
| Installation | Length decision | Before ordering |
|---|---|---|
| External eGPU or mini PC | Allow for the enclosure exit, port direction and normal movement without pulling the connector. | Confirm the host-side and device-side connector, lane count and clearance. |
| Internal NVMe expansion | Route around the chassis and cooling hardware without a tight bend at either end. | Confirm SFF-8611/SFF-8612 direction, SSD interface and any power requirement. |
| Server or backplane | Measure the installed harness path and keep the assembly clear of fans and service points. | Confirm 4i/8i mapping, PCIe generation, shielding and validation requirements. |
For a project quote, send the measured target length, host and device interfaces, PCIe generation, application and quantity through the OCuLink inquiry form.
PCIe 4.0 x4 to OCuLink Adapter Card (Internal) designed to expand high-speed PCIe connectivity for servers, workstations, storage systems, and high-performance PC builds.
PCIe 4.0 x4 to OCuLink Adapter Card (External) designed to expand high-speed PCIe connectivity for servers, workstations, storage systems, and high-performance PC builds.
PCIe 4.0 x4 to OCuLink Adapter Card (External) designed to expand high-speed PCIe connectivity for servers, workstations, storage systems, and high-performance PC builds.
PCIe 4.0 x8 to OCuLink Adapter Card (Internal) designed to expand high-speed PCIe connectivity for servers, workstations, storage systems, and high-performance PC builds.
PCIe 4.0 x16 to OCuLink Adapter Card (Internal) designed to expand high-speed PCIe connectivity for servers, workstations, storage systems, and high-performance PC builds.
PCIe 4.0 OCuLink SFF-8611 4i Cable for high-bandwidth PCIe connections, with 16 GT/s support depending on host and device configuration.
Measure the complete routing path, including connector clearance and bend allowance. Choose the shortest length that reaches without strain, then validate the cable with the actual host, device and PCIe generation.
Yes. Share your application, interface, PCIe generation, length, and quantity through the contact form.
No. Connector family, lane count, orientation, PCIe generation, length, and platform compatibility all matter.