Lenovo 4XH7A86397 SR655 V3 X16/X16 G4 R3 PCIe Riser Kit
Overview
The Lenovo 4XH7A86397 is a PCIe Gen 4 riser kit — specifically the X16/X16 G4 R3 configuration — designed for the ThinkSystem SR655 V3 server platform. At 10 lb, this is a substantial mechanical assembly that provides dual x16 PCIe Gen 4 slots in a riser-card format, enabling high-bandwidth add-in card installation in SR655 V3 chassis configurations where the base riser does not meet expansion requirements. Install this when you need to seat dual full-bandwidth PCIe Gen 4 x16 cards — GPUs, HBAs, or 100GbE NICs — in an SR655 V3 that requires the R3 riser position.
Compatibility
Designed for the Lenovo ThinkSystem SR655 V3 server. The R3 designation identifies the specific riser slot position within the SR655 V3 chassis; verify your chassis configuration and riser bay mapping against the SR655 V3 hardware maintenance manual before ordering. This kit is not cross-compatible with SR655 (non-V3), SR650, or other ThinkSystem platforms — each generation uses mechanically distinct riser assemblies. If you are populating a server expansion card bay that calls for R3 with dual x16 Gen 4 lanes, 4XH7A86397 is the correct part number.
Installation Notes
Riser kit installation in the SR655 V3 requires powering down and fully seated chassis access. Confirm the target riser bay (R3) is vacant and that your add-in cards do not exceed the thermal and power envelopes defined in the SR655 V3 configuration guide — dual x16 slots at full Gen 4 bandwidth can draw significant power from the system bus. Country of origin is Mexico (MX). UNSPSC commodity code 43211600 (computer hardware components).
