Lenovo 4XH7A91476 SR650 V3 E/X16/X16 G5 RISER1/2 KIT V2

Lenovo 4XH7A91476 SR650 V3 PCIe Gen5 Riser 1/2 Kit V2

Overview

The Lenovo 4XH7A91476 is a dual-riser expansion kit — E/X16/X16 configuration, Gen 5 — designed specifically for the ThinkSystem SR650 V3 rack server. If you need to add or restore full PCIe Gen5 slot capacity to an SR650 V3 chassis, this kit provides Riser 1 and Riser 2 together in a single part number, eliminating the coordination problem of sourcing them separately. At 10 lb, the assembly is substantial — both riser assemblies and associated hardware ship as a matched set.

Compatibility

This kit is compatible with the Lenovo ThinkSystem SR650 V3 server platform exclusively. The E/X16/X16 designation indicates an edge connector plus two x16 PCIe slots per riser — confirm your SR650 V3 chassis revision and existing riser configuration before ordering, as Lenovo produces multiple riser variants for this platform and mixing incompatible riser versions can prevent proper seating and PCIe link negotiation. The V2 suffix on this kit denotes the second revision of the G5 riser assembly; verify against your SR650 V3 service documentation that V2 is the correct revision for your chassis build date.

Installation Notes

Riser installation on the SR650 V3 requires powering down and disconnecting the server per Lenovo's standard maintenance procedure. Riser cards seat into dedicated slots on the system board and chassis guides — improper alignment can damage the edge connector. Refer to the Lenovo ThinkSystem SR650 V3 Hardware Maintenance Guide for torque specs on retention screws and cable routing requirements for any PCIe devices installed into the riser slots post-installation.