Lenovo 4X97A80400 SR665 2.5-Inch Front 16x NVMe Backplane Cable Kit V2

Overview

The Lenovo 4X97A80400 is the V2 cable assembly for the ThinkSystem SR665 server's 2.5-inch front drive bay configuration, specifically wiring backplane positions BP2 and BP3 to support up to 16 NVMe drives. If you're expanding or rebuilding NVMe storage capacity in an SR665 chassis, this is the cable set that bridges those two backplanes to the system board — without it, those drive slots remain electronically invisible regardless of what drives you install.

The SR665 is Lenovo's dual-socket AMD EPYC-based 2U rack server, widely deployed in storage-intensive and compute-dense environments. Front-bay NVMe configurations in this platform require specific, routed cable assemblies for each backplane zone — the 4X97A80400 covers the BP2+3 zone in the 16-drive 2.5-inch layout. The V2 designation indicates this is the current-generation revision of this cable, and it should be matched to SR665 systems that call for it specifically in the Lenovo hardware maintenance manual or configuration guide for your chassis revision.

Key Features

• 16x NVMe Drive Support: Wires BP2 and BP3 together, enabling the full 16-drive NVMe front bay population in the SR665 2.5-inch configuration. Without both backplanes cabled, you lose half your addressable NVMe slots — relevant when configuring high-density all-flash storage pools.
• SR665-Specific Routing: Designed and routed for the SR665 chassis geometry. Generic or cross-platform cables won't clear the internal airflow baffles or reach the correct mid-plane connectors without compromising cable management or airflow.
• V2 Revision: The V2 designation matters for ordering — mixing V1 and V2 cable assemblies in a revised SR665 build can introduce connector incompatibilities. Confirm your chassis revision before ordering to ensure this is the correct variant.
• Factory-New Genuine Component: Sourced as a genuine Lenovo option part. Server cable assemblies sourced from grey-market channels frequently present with incorrect pinouts or non-standard lengths that cause intermittent NVMe enumeration failures — harder to diagnose than a hard drive failure.
• Lightweight Field Replacement: At 2.00 lb, this is a manageable field-replacement part. Cable failures or damage during drive swaps are among the more common causes of NVMe bay dropouts in dense 2U configurations; stocking a spare is reasonable practice for high-availability deployments.

Integration & Compatibility

The 4X97A80400 is designed for the Lenovo ThinkSystem SR665 server platform in the 2.5-inch front 16x NVMe drive configuration. Compatibility is chassis-revision-specific — verify against the Lenovo SR665 product guide or hardware maintenance manual for your system's backplane topology before installation. This cable is not interchangeable with SR650, SR630, or other ThinkSystem platforms, nor with the 3.5-inch bay variants of the SR665.

Frequently Asked Questions

Q: What server platform is the 4X97A80400 designed for?

A: The 4X97A80400 is designed for the Lenovo ThinkSystem SR665 server in the 2.5-inch front 16x NVMe drive bay configuration, specifically connecting backplane positions BP2 and BP3.

Q: Does the 4X97A80400 support SAS or SATA drives, or only NVMe?

A: Based on the product designation (16x NVMe), this cable assembly is for NVMe (PCIe-based) drive connections. It is not a SAS or SATA backplane cable. Verify your SR665 backplane configuration before ordering.

Q: What does the V2 designation mean for the 4X97A80400?

A: V2 indicates the second revision of this cable assembly. It should be matched to SR665 chassis revisions that specify the V2 cable. Check your Lenovo hardware maintenance manual or configuration guide to confirm which revision your system requires.

Q: Can I use the 4X97A80400 in an SR650 or other ThinkSystem server?

A: No. This cable is chassis-specific to the SR665 platform. It is not compatible with other ThinkSystem models due to differences in backplane layout, routing geometry, and connector positioning.

Q: What is the weight of the 4X97A80400?

A: The 4X97A80400 weighs 2.00 lb.

Eden Phillips

The 4X97A80400 is one of those parts that stops an entire NVMe expansion project cold if it's missing or on the wrong revision. On the SR665, the front 2.5-inch 16x NVMe layout splits across multiple backplane zones — BP2 and BP3 each need their own cable path to the system board, and this assembly handles both in a single routed kit. At 2.00 lb it ships light, but don't let that fool you into treating it as interchangeable with adjacent cable part numbers.

Technical Highlights:

• BP2+3 dual-zone coverage: A single cable assembly addresses both backplane positions, which simplifies the bill of materials for a full 16-drive NVMe front bay build — you're not juggling two separate part numbers for the same expansion.
• V2 revision specificity: The V2 designation is not cosmetic. SR665 chassis revisions that call for V2 have updated connector positions or routing paths that the V1 assembly won't satisfy cleanly — ordering the wrong revision introduces a serviceability problem, not just a cosmetic one.
• 2.00 lb field weight: Light enough to keep on the shelf as a spare in any data center running SR665 systems. Cable assembly failures from repeated drive swaps in high-churn NVMe bays are a real failure mode — having this part stocked avoids an unplanned procurement delay.

Deployment Considerations:

• Before ordering, cross-reference your SR665 chassis serial number or build date against the Lenovo hardware maintenance manual to confirm V2 is the correct revision for your specific unit — Lenovo updated cable routing between chassis revisions and the V1/V2 split is not always obvious from the server's external label.
• This cable does not include backplane units or drive carriers — it is the cable assembly only. If you're replacing a damaged cable after a hot-swap incident, verify the backplane connectors on both ends are undamaged before assuming the cable is the sole failure point.

The 4X97A80400 is the right stocking part for IT teams managing a fleet of SR665 servers in all-NVMe or NVMe-tiered storage configurations — particularly in environments with high drive turnover where cable stress from repeated bay access is a real wear factor.