PCIe 4.0 M.2 Key A.E. to M.2 Key M NVMe Female Extension Cable

PCIe 4.0 M.2 Key A.E. to M.2 Key M NVMe Female Extension Cable

The PCIe 4.0 M.2 Key A.E. to M.2 Key M NVMe Female Extension Cable is a high‑performance adapter solution designed to enable NVMe SSD connectivity through an M.2 Key A or Key E slot with support for PCIe 4.0 data rates. This cable converts a standard M.2 Wi‑Fi interface (Key A+E) into a dedicated M.2 Key M slot, allowing users to install an NVMe M.2 SSD in systems that lack a native M.2 Key M port. The physical Key M female connector on the target end supports M.2 modules in form factors 2280, 2260, 2242, and 2230 with Key M or Key B+M based on PCIe (NVMe). Operating at up to 16.0 GT/s per lane, this cable delivers double the bandwidth of PCIe 3.0, enabling faster boot times, quicker file transfers, and improved overall system responsiveness for demanding storage workloads. While the connector is Key M, the actual PCIe lane count is determined by the host M.2 slot—typically one lane (x1) at PCIe 4.0 speeds, delivering up to 16 Gbps of raw bandwidth. This cable is an ideal solution for upgrading compact systems such as mini‑PCs, NUCs, laptops, and all‑in‑one desktops with cutting‑edge NVMe storage performance without requiring a motherboard replacement. Engineered with precision‑matched conductors, multilayer shielding, and strict impedance control, the cable ensures reliable signal integrity at PCIe 4.0 frequencies and provides a cost‑effective, space‑saving storage expansion pathway.

Features

• The cable features an M.2 Key A+E male connector on the host side, compatible with standard M.2 slots commonly used for Wi‑Fi or Bluetooth modules. It provides access to the available PCIe lane(s), clock signals, and 3.3V power from the host system.
• On the target end, the cable presents a standard M.2 Key M female slot, supporting NVMe M.2 SSDs in form factors 2280, 2260, 2242, and 2230. The slot is keyed and compliant with M.2 mechanical specifications, ensuring a secure fit for standard NVMe drives. A 15‑pin SATA power connector is optionally integrated to provide additional 12V power when the host M.2 slot cannot supply sufficient current for high‑performance SSDs, though most NVMe drives operate within the 3.3V limits of the M.2 interface.
• The cable supports PCIe 4.0 signalling with a per‑lane data rate of up to 16.0 GT/s. The total throughput depends on the number of lanes available from the host M.2 slot—typically one lane (x1) on most Key A+E implementations, delivering approximately 16 Gbps of raw bandwidth, which is double that of PCIe 3.0. The physical Key M connector ensures compatibility with a wide range of NVMe SSDs, even if they operate at the available lane count.
• To maintain signal integrity at the higher frequencies of PCIe 4.0, the cable employs precision‑matched 30 AWG axial conductors for each high‑speed pair, with individual foil shielding and an overall braid plus outer foil shield. This multilayer shielding minimises insertion loss, crosstalk, and electromagnetic interference, ensuring clean signal transmission over the cable length. The cable is carefully tuned to meet PCIe 4.0 channel budget requirements, with typical insertion loss below 1.5 dB at 8 GHz.
• The PCB on the target end features a durable, high‑frequency design optimised for low‑attenuation signal transmission. Solder joints are reinforced with PCB‑swaddling and fixed with bolts and nuts to prevent tearing and short circuits, ensuring long‑term reliability even with repeated SSD installation and removal.
• The flexible cable jacket allows tight‑radius bends and neat routing within cramped chassis, improving internal airflow and simplifying cable management. The cable thickness is approximately 1.4 mm, making it soft and easy to route, though bending or pulling within 2 cm of the solder joints is not recommended to avoid stress on the connections.
• As a passive copper assembly with no active retimers, the cable adds negligible latency and consumes no additional power from the host. It is fully backward compatible with PCIe 3.0, 2.0, and 1.0 devices, enabling seamless integration into mixed‑generation systems. The cable is compatible with Windows, Linux, and macOS without requiring proprietary drivers.
• Custom lengths are available upon request, with standard options typically ranging from 5 cm to 100 cm, allowing flexible placement of the SSD within the chassis for improved thermal management and cable routing.

Specifications

• Product Name: PCIe 4.0 M.2 Key A.E. to M.2 Key M NVMe Female Extension Cable
• Host Interface: M.2 Key A+E Male (compatible with Key A or Key E slots)
• Target Interface: M.2 Key M Female slot (supports Key M or Key B+M NVMe SSDs)
• Supported Form Factors: 2230, 2242, 2260, 2280
• Auxiliary Power: Optional 15‑pin SATA power connector (for 12V supply if needed)
• Data Transfer Rate: Up to 16.0 GT/s (PCIe 4.0) per lane; total bandwidth depends on host lane count (typically x1, approx. 16 Gbps)
• Supported Protocols: PCI Express 4.0 (NVMe), backward compatible with PCIe 3.0, 2.0, and 1.0
• Lane Configuration: Physical Key M slot; electrical lanes provided are those available from the host M.2 (typically x1)
• Cable Type: Shielded flexible cable assembly with axial conductors
• Cable Gauge: 30 AWG for data pairs; appropriate gauge for power and sideband signals
• Shielding: Individual pair foil shielding + overall braid and outer foil shield
• Impedance: 85 ohm ± 10% (differential) for data pairs
• Insertion Loss: Optimised for PCIe 4.0 channel budget (typical < 1.5 dB at 8 GHz)
• Cable Thickness: Approx. 1.4 mm
• PCB Quality: High‑frequency, low‑attenuation design with solder point protection
• Operating Temperature: -5°C to +70°C
• Storage Temperature: -40°C to +85°C
• Power Delivery: Provides 3.3V power from the host M.2 slot (typically up to 3A) to the connected NVMe SSD; optional 12V via SATA power connector for drives requiring additional current
• Compatibility: Windows, Linux, macOS
• RoHS Compliance: Yes, fully compliant with RoHS and REACH directives

Applications

• This cable is ideal for adding PCIe 4.0 NVMe storage performance to compact systems that lack a native M.2 Key M slot but have an available Key A or Key E slot, such as mini‑PCs, NUCs, laptops, and all‑in‑one desktops. It allows users to repurpose the Wi‑Fi slot for high‑speed storage expansion, delivering near‑native NVMe speeds for demanding applications like video editing, gaming, and large data transfers.
• It is also well‑suited for upgrading legacy systems where the motherboard does not include an M.2 NVMe connector but features an M.2 Wi‑Fi interface. By utilising the existing slot, users can add modern NVMe SSD performance without replacing the entire motherboard, significantly extending the useful life of older hardware.
• For system integrators and OEMs, the cable provides a flexible solution for adding storage options to compact form‑factor designs. The flexible cable length and routing capability allow the SSD to be positioned optimally within the chassis for improved airflow and thermal management, while the optional SATA power connector ensures compatibility with drives that have higher power requirements.
• In prototyping and development environments, the cable enables easy connection of PCIe 4.0 NVMe SSDs to test platforms that feature M.2 Key A+E slots, simplifying storage validation, performance benchmarking, and compatibility testing for next‑generation storage devices.
• The cable is also valuable for DIY enthusiasts and educational projects, providing an accessible way to experiment with high‑speed NVMe storage on affordable or legacy hardware platforms, and enabling hands‑on learning about PCIe interface conversion and storage expansion.

For custom lengths, special jacket materials, alternative connector orientations, or integration of the optional SATA power connector, please contact our sales team to tailor the cable to your specific system requirements.

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