Lenovo 4X97A82946 SR650 V3 2ND CPU GEN5 RISER3 CBL

Lenovo 4X97A82946 SR650 V3 2nd CPU Gen5 Riser3 Cable

Overview

The Lenovo 4X97A82946 is a second-CPU riser cable designed specifically for the ThinkSystem SR650 V3 rack server. It enables the Gen5 Riser3 slot when deploying a dual-processor configuration — a prerequisite for expanding PCIe Gen5 I/O capacity in memory- or bandwidth-intensive workloads where a single CPU lane count becomes the bottleneck. If you're provisioning an SR650 V3 for high-throughput NVMe storage or multi-GPU inference, installing a second CPU without this cable leaves Riser3 non-functional.

Compatibility

This cable is designed for the Lenovo ThinkSystem SR650 V3 server platform exclusively. It supports 2S (dual-socket) SR650 V3 configurations where a second Xeon Scalable processor is installed and PCIe Gen5 Riser3 expansion is required. It is not interchangeable with SR650 V2, SR630 V3, or other ThinkSystem platforms — riser cabling is chassis- and generation-specific. Verify your SR650 V3 chassis revision and existing riser kit against Lenovo's configuration guide before ordering to confirm 4X97A82946 is the correct cable for your Riser3 assembly.

Installation Notes

Installation requires powering down and fully de-racking the SR650 V3 to access the riser3 slot area. The cable routes between the second CPU socket region and the Riser3 PCIe assembly — consult the SR650 V3 hardware maintenance guide for the exact routing path and connector seating sequence. Improper cable seating will prevent Riser3 from enumerating PCIe devices. Country of origin is Mexico; factory-new, genuine Lenovo part sourced through channel-direct distribution.