Lenovo 4XH7A82904 ThinkSystem SR650 V3 x8/x8 PCIe Gen4 Riser 3 Option Kit
Overview
The Lenovo 4XH7A82904 is a PCIe Gen4 x8/x8 Riser 3 option kit designed to expand the I/O capacity of ThinkSystem SR650 V3 rack servers. If your SR650 V3 deployment requires additional PCIe slots — for GPU cards, high-speed NIC adapters, HBAs, or storage controllers in the third riser position — this kit provides the mechanical and electrical infrastructure to support that expansion. At 5 lb, the assembly is a substantive add-in component, not a passive bracket, and is manufactured in Mexico to Lenovo's server-grade tolerances.
Compatibility
The 4XH7A82904 is engineered specifically for the Lenovo ThinkSystem SR650 V3 2U rack server. It is not interchangeable with Riser 1 or Riser 2 positions, nor with predecessor platforms such as the SR650 V2 or original SR650 — riser geometry, connector keying, and firmware enumeration differ across generations. Before ordering, confirm your SR650 V3 chassis configuration supports a third riser slot and that your target PCIe add-in cards are compatible with x8 Gen4 electrical bandwidth. This kit supports high-bandwidth network and storage adapters that require Gen4 throughput — pairing it with a Gen3-only card will work electrically but will not fully use available bandwidth. Verify chassis airflow baffles and power distribution are configured for the populated riser position per Lenovo's SR650 V3 hardware maintenance guide.
Installation Notes
Installation requires access to the SR650 V3 chassis interior with the server powered down and rack-slid or removed. The riser card slots into the Riser 3 mechanical cage position; secure all retention clips fully before closing the chassis to avoid seating faults under vibration. PCIe add-in cards installed into this riser should not exceed the slot's electrical and thermal envelope — consult the SR650 V3 server component compatibility matrix for per-slot power limits. No special tooling beyond a Phillips screwdriver is indicated by the distribution evidence, though Lenovo's service documentation should be consulted for torque specs on any retaining hardware.
