Lenovo 4XH7B08908 SR860 V4 G4 Riser X8/X8
Overview
The Lenovo 4XH7B08908 is a PCIe riser card designed for the ThinkSystem SR860 V4 platform, providing dual x8 PCIe lane allocation in a G4 riser form factor. If you're expanding I/O capacity on an SR860 V4 — adding GPU accelerators, NVMe HBAs, or high-throughput network adapters — this riser positions the expansion slots correctly for your chassis bay assignment. At 10 lb, this is a substantial assembly; handle with care during installation to avoid flex stress on the PCIe connector. Country of origin is Mexico.
Compatibility
Designed specifically for the Lenovo ThinkSystem SR860 V4 4-socket enterprise server. The G4 riser designation indicates bay and slot positioning specific to this platform — do not attempt to fit this riser into SR850 V3, SR860 V3, or earlier SR860 generations, as the mechanical keying and backplane connectors differ. Verify your SR860 V4 configuration guide to confirm which riser bay (typically Riser 3 or 4 in a fully populated chassis) accepts the G4 X8/X8 assembly before ordering. Pair with compatible high-density networking or storage HBA adapters that fit a x8 mechanical slot.
Installation Notes
Seat the riser firmly into the system board riser connector — partial seating causes PCIe link training failures that may not surface until OS enumeration. Confirm slot assignment against the SR860 V4 server hardware maintenance guide before populating adapter cards, as lane bifurcation settings in UEFI must match the physical riser installed. The 10 lb assembly weight suggests an integrated cage and bracket; use two-handed support when extracting or installing to avoid lever stress on the connector pins.
