Lenovo 4XH7A09837 SR655 X16/X16 PCIE RISER1 FH KIT

Lenovo 4XH7A09837 SR655 PCIe x16/x16 Riser 1 Full-Height Kit

Overview

The Lenovo 4XH7A09837 is a PCIe riser card kit that adds or restores a dual x16/x16 PCIe slot configuration in the Riser 1 position of a ThinkSystem SR655 server. If you're expanding GPU, HBA, or high-bandwidth NIC capacity in an SR655 chassis, this kit provides the mechanical and electrical interface needed to seat full-height, full-length cards where the slot would otherwise be absent or non-functional. The kit ships at 13.60 x 6.40 x 9.10 in and weighs 1.85 lb — sized for the SR655 form factor.

Compatibility

Designed specifically for the Lenovo ThinkSystem SR655 1U/2U AMD EPYC rack server. The x16/x16 dual-slot configuration in the Riser 1 position supports full-height add-in cards — GPUs, storage HBAs, 25GbE/100GbE NICs, and PCIe server expansion cards that require the physical height clearance of a full-height bracket. Verify chassis bay assignment and riser slot mapping against your SR655 Configuration Guide before ordering; not all SR655 configurations ship with this riser populated. UNSPSC code 43211600 (computer components/peripherals) confirms product classification.

Installation Notes

Installation targets the Riser 1 bay of the SR655 chassis. Full-height card clearance means the installed add-in card must fit within the chassis internal height — confirm card length against the SR655 internal dimensions before provisioning. PCIe bifurcation settings (x16/x16 vs x16/x8/x8) should be validated in UEFI/BIOS after seating to ensure both slots enumerate correctly under the intended workload. No additional power adapter is required for the riser assembly itself; GPU or HBA cards seated in the riser may require supplemental PCIe power connectors from the server's internal cabling.