Lenovo 4X97A59854 SR645 6+4 NVME Cable KIT (1-CPU)

Lenovo 4X97A59854 SR645 6+4 NVMe Cable Kit (1-CPU)

Overview

The Lenovo 4X97A59854 is the OEM NVMe cable kit designed for single-CPU ThinkSystem SR645 server configurations requiring a 6+4 NVMe drive backplane wiring layout. If you are expanding NVMe storage in an SR645 chassis running one processor and the factory cable bundle is missing or needs replacement, this kit provides the correct routing harness without the guesswork of sourcing third-party cables that may not seat properly in Lenovo's proprietary backplane connectors. The NVMe interface ensures full-bandwidth, low-latency connectivity between the backplane and the CPU's PCIe lanes — critical for storage-intensive workloads where cable impedance mismatches or incorrect pinouts would throttle throughput or cause drive enumeration failures.

Compatibility

Designed specifically for the Lenovo ThinkSystem SR645 rack server in 1-CPU (single-processor) configurations. The 6+4 designation refers to the drive bay grouping supported by this cable harness — confirm your SR645 backplane model and CPU socket population before ordering, as the 2-CPU variant requires a different cable kit. This part is not cross-compatible with SR650, SR630, or other ThinkSystem platforms; backplane connector positions and cable lengths are chassis-specific. Verify your server's order code and current backplane configuration against Lenovo's SR645 server components compatibility matrix before purchase.

Installation Notes

Route cables according to the SR645 maintenance manual cable-routing diagrams to avoid pinch points near the CPU heatsink and airflow baffles. Seating NVMe backplane connectors requires firm, even pressure — partial insertion will result in drives not being detected by the BIOS. Confirm CPU socket 1 is populated before commissioning the 6+4 layout; an unpopulated socket 1 means the PCIe lanes feeding this cable's backplane segment are inactive.