Lenovo 4X97A82945 SR650 V3 Single CPU PCIe Gen4 Riser 3 Cable
Overview
The Lenovo 4X97A82945 is an internal riser cable assembly for the ThinkSystem SR650 V3 rack server, specifically the Single CPU configuration. It provides the physical PCIe Gen4 signal path for the Riser 3 slot, enabling x16/x16 bifurcated expansion — the type of slot layout used when populating high-bandwidth add-in cards such as dual-port storage HBAs, network adapters, or GPU accelerators in the third riser position. Without this cable, Riser 3 cannot be populated or recognized by the system, leaving expansion capacity unused.
Compatibility
Designed exclusively for the Lenovo ThinkSystem SR650 V3 in Single CPU configurations. This cable is specific to the Riser 3 slot on that platform — it is not interchangeable with SR650 V2, SR650 (Gen1), or dual-CPU SR650 V3 builds, which use different riser cable assemblies. Confirm your server's CPU population and riser slot assignment before ordering. Consult your SR650 V3 server component documentation or the system board silk-screen labeling to verify Riser 3 assignment in single-CPU mode.
Installation Notes
Installation requires access to the SR650 V3 chassis interior with the server powered down and removed from the rack. The cable routes between the system planar and the Riser 3 card cage; seat both connectors fully until the latch clicks to ensure PCIe link negotiation at Gen4 speeds. Partial seating will cause the slot to train at a reduced link rate or fail enumeration entirely. Country of origin is Mexico. Weight is 10 lb, which reflects packaged shipping weight including the cable assembly and protective packaging — plan accordingly when ordering alongside other components for a rack server build.
