Lenovo 4XH7A82906 SR650 V3 X8/X8 G5 RISER3 KIT

Lenovo 4XH7A82906 SR650 V3 X8/X8 G5 Riser 3 Kit

Overview

The Lenovo 4XH7A82906 is a PCIe riser expansion kit designed for the ThinkSystem SR650 V3 rack server. Riser 3 adds a third expansion zone — specifically an X8/X8 Gen 5 configuration — giving architects a dedicated slot pair for high-bandwidth add-in cards such as additional network adapters, storage controllers, or GPU accelerators in compute-dense deployments. If your SR650 V3 build is saturating the primary riser slots or you need a dedicated PCIe Gen 5 path for a specific workload adapter, the 4XH7A82906 provides that without requiring a chassis swap or motherboard modification. The kit weighs 2.15 lb and measures 13.60 × 9.10 × 6.30 in, so confirm adequate internal clearance before ordering for populated servers.

Compatibility

This riser kit is specific to the Lenovo ThinkSystem SR650 V3 — the V3 generation chassis only. It is not interchangeable with SR650 V2 or earlier SR650 riser assemblies, which use different backplane connectors and slot geometries. The X8/X8 Gen 5 lane configuration means both slots operate at PCIe 5.0 x8 electrical, which matters when pairing with Gen 5-capable NICs or NVMe controllers where halved bandwidth at Gen 4 would become a bottleneck. Verify your SR650 V3's current riser population in the Lenovo server accessories configurator before ordering — the SR650 V3 supports up to three riser assemblies depending on chassis model and processor population, and Riser 3 requires specific processor and chassis prerequisites documented in the ThinkSystem SR650 V3 maintenance manual.

Installation Notes

Installation follows standard Lenovo tool-less riser seating for the SR650 V3 platform — the riser assembly seats into the dedicated Riser 3 socket on the system board and is secured by the chassis retention mechanism. Power the system down and follow ESD precautions before handling. Confirm the server's firmware (UEFI/XCC) is at the minimum version required to enumerate the Gen 5 riser before deploying production workloads on installed adapters.