Lenovo 4XH7A85887 SR665 V3 X16/X16 PCIE G5 RISER3 KIT

Lenovo 4XH7A85887 SR665 V3 PCIe Gen5 x16/x16 Riser 3 Kit

Overview

The Lenovo 4XH7A85887 is a PCIe Gen5 x16/x16 Riser 3 Kit designed for the ThinkSystem SR665 V3 server. If your SR665 V3 deployment calls for additional high-bandwidth expansion slots — GPU accelerators, high-speed NICs, or NVMe HBAs — this riser kit is the factory-engineered path to get there without improvised third-party adapters. PCIe Gen5 doubles the per-lane bandwidth of Gen4, which matters when you are driving 400GbE adapters or multi-GPU compute workloads where slot saturation is a real constraint. The 4XH7A85887 provides two x16 Gen5 slots in the Riser 3 position, preserving compatibility with Lenovo's thermal and firmware validation for the SR665 V3 platform.

Compatibility

This riser kit is engineered specifically for the Lenovo ThinkSystem SR665 V3 rack server platform. It installs in the Riser 3 slot position and is not interchangeable with SR665 (non-V3), SR665 V2, or other ThinkSystem models — the Gen5 signaling, physical bracket geometry, and firmware mapping are SR665 V3-specific. Before ordering, confirm your SR665 V3 chassis configuration supports a third riser position; some base configurations ship without the Riser 3 bay populated. Pair with compatible server expansion accessories and verify your target PCIe cards are Gen5-capable to realize the full bandwidth available from this kit. Review Lenovo's server component compatibility matrix for approved adapter cards in the SR665 V3 platform.

Installation Notes

Install follows standard Lenovo tool-less riser procedures for the SR665 V3 chassis. Ensure the server is fully powered down and discharged before seating the riser. The Riser 3 position requires the corresponding chassis bracket slot to be unobstructed — verify no cable routing conflicts with adjacent Riser 1 or Riser 2 assemblies. PCIe card thermal envelopes should be validated against the SR665 V3's airflow configuration, particularly in dense GPU or NIC deployments where Riser 3 sits downstream of primary airflow. Weight is 1.00 lb, so handling and seating are straightforward, but card retention clips should be confirmed locked before re-powering.