Lenovo 4XH7A09838 SR655 PCIe x16/x8/x8 Riser 1 Full-Height Kit

Overview

The Lenovo 4XH7A09838 is the factory Riser 1 expansion kit for the ThinkSystem SR655, delivering a three-slot PCIe configuration — one x16 and two x8 lanes — in a full-height form factor. When you need to populate the primary riser bay with full-height expansion cards (GPUs, HBAs, NICs, or RAID controllers), this is the correct mechanical and electrical assembly for that slot position. Without the matching riser kit installed, those PCIe slots are simply unavailable; this kit restores or expands that capacity as part of a planned build-out or upgrade.

Compatibility

Designed specifically for the Lenovo ThinkSystem SR655 1U/2U rack server. The x16 slot accommodates double-wide GPU or high-bandwidth HBA cards; the paired x8 slots are suited for dual-port NICs, FC HBAs, or secondary storage controllers. This kit covers Riser 1 (the primary riser position) in full-height configuration — verify your SR655 chassis supports the full-height riser bay before ordering, as low-profile variants require a different assembly. Not compatible with SR645, SR635, or other ThinkSystem platforms.

Installation Notes

The kit weighs 2.00 lb and fits within a 12.50 × 9.00 × 6.50 in envelope — account for clearance inside the SR655 chassis before seating expansion cards. PCIe interface; no additional power cabling is included for the riser assembly itself, though individual expansion cards installed into the riser may require supplemental power connectors from the server's internal power harness. Follow the SR655 Hardware Maintenance Guide torque and card-seating procedures to avoid damage to the riser connector or chassis guides.