Lenovo 4XH7A91475 SR650 V3 X16/X16/E G5 RISER1/2 KIT V2

Lenovo 4XH7A91475 SR650 V3 PCIe G5 x16/x16 Riser Kit

Overview

The Lenovo 4XH7A91475 is a PCIe Gen 5 riser card kit designed to expand the I/O capacity of ThinkSystem SR650 V3 servers. Designated as the Riser 1/2 Kit V2, this assembly provides dual x16 plus one additional PCIe slot configuration, enabling server administrators to install additional GPUs, HBAs, high-speed NICs, or other expansion cards in SR650 V3 deployments where the baseline riser configuration falls short of workload demands. If your SR650 V3 chassis is running out of full-bandwidth expansion slots for compute accelerators or storage controllers, this kit adds the headroom you need without a chassis swap.

Compatibility

Designed specifically for the Lenovo ThinkSystem SR650 V3 server platform. The V2 revision designation indicates this kit is matched to the updated SR650 V3 board and backplane layout — confirm your SR650 V3 board revision before ordering, as earlier SR650 (V1/V2) chassis use a different riser form factor and are not compatible. Slot configuration delivers x16/x16/E PCIe Gen 5 lanes, meaning full-bandwidth connectivity for two primary expansion cards plus an auxiliary slot — relevant for network video recorder builds pairing a high-lane-count GPU with a dedicated 10/25GbE NIC or SAS HBA. Consult the Lenovo ServerProven compatibility matrix to verify specific adapter cards against this riser before procurement.

Installation Notes

At 10 lb, this is a substantial metal assembly — plan for two-person handling during installation in a rack-mounted SR650 V3. The kit installs into the designated Riser 1 and Riser 2 bays; ensure the server is fully powered down and grounded before seating. PCIe Gen 5 connectors require firm, even seating pressure — partial engagement causes link negotiation failures that can be difficult to diagnose. Country of origin is Mexico (MX). Factory-new, genuine Lenovo part sourced through channel-direct distribution.