Lenovo 4XH7A86396 SR655 V3 X8/X8 G4 R3 KIT

Lenovo 4XH7A86396 SR655 V3 PCIe Riser Kit

Overview

The Lenovo 4XH7A86396 is a PCIe riser kit designed for the ThinkSystem SR655 V3 server, providing dual x8/x8 Gen 4 PCIe expansion slots in an R3 riser configuration. This kit addresses a specific expansion need: adding or reconfiguring PCIe add-in cards — such as HBAs, NICs, or GPU accelerators — in SR655 V3 deployments where the base riser configuration does not provide the required slot count or bandwidth. At 10 lb, the assembly is a substantial mechanical component; handle with care during installation to avoid flex damage to the riser card substrate.

Compatibility

This kit is designed specifically for the Lenovo ThinkSystem SR655 V3 server platform. The x8/x8 Gen 4 electrical configuration means each slot delivers up to PCIe 4.0 x8 bandwidth — adequate for dual 25GbE NICs, dual-port HBAs, or mid-range GPU cards, but not sufficient for full x16 GPU workloads. Verify your SR655 V3 chassis revision and existing riser population against Lenovo's SR655 V3 configuration guide before ordering; riser slot availability depends on processor, power supply, and drive bay configuration choices made at initial system build.

Installation Notes

Riser kit installation requires the SR655 V3 chassis to be powered down and fully de-energized before removal of the top cover. Seat the riser assembly firmly into the system board riser connector — improper seating is a common source of PCIe link training failures at POST. Secure any retention brackets per the server's technical installation guide. Country of origin: Mexico (MX).