Lenovo 4XH7A91474 SR650 V3 X16/X8/X8 G5 RISER1/2 KIT V2

Lenovo 4XH7A91474 SR650 V3 PCIe Riser 1/2 Expansion Kit

Overview

The Lenovo 4XH7A91474 is a PCIe Gen 5 riser kit designed to expand the I/O capacity of ThinkSystem SR650 V3 rack servers. It delivers an x16/x8/x8 slot configuration across Riser 1 and Riser 2 positions, giving system architects room to install high-bandwidth add-in cards — GPU accelerators, NVMe HBAs, 100GbE NICs, or capture cards — without compromising bandwidth on adjacent slots. If your SR650 V3 build is running short on full-speed PCIe lanes for demanding workloads, this kit is the slot expansion path the platform is designed to support.

Compatibility

This kit is designed exclusively for the Lenovo ThinkSystem SR650 V3 server platform. The x16/x8/x8 slot layout is specific to the SR650 V3 chassis geometry — it is not interchangeable with SR650 (Gen 1/2), SR630 V3, or other ThinkSystem 2U platforms. Verify your SR650 V3 configuration guide to confirm which riser bay positions (Riser 1 and Riser 2) are populated and whether your chassis revision accepts the V2 riser revision before ordering. Consult Lenovo's SR650 V3 server components configuration matrix to validate card slot assignments against your planned add-in card TDP and PCIe lane budgets.

Installation Notes

Installation is performed inside the SR650 V3 chassis with the server powered off and riser assemblies seated into the designated Riser 1/2 bays. Confirm your SR650 V3 firmware and UEFI are current before commissioning new riser hardware, as PCIe bifurcation settings may need to be adjusted in the UEFI configuration utility to match the x16/x8/x8 lane split. The kit weighs 1.00 lb and is manufactured in Mexico.