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Main image of AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

Alt view image 2 of 7 - AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

Alt view image 3 of 7 - AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

Alt view image 4 of 7 - AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

Alt view image 5 of 7 - AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

Alt view image 6 of 7 - AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

Alt view image 7 of 7 - AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

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AJMRTC PCIe 4.0 M.2 NGFF M-Key to SFF-8643 Adapter, Horizontal Type, 2280mm, for U.2 SFF-8639 NVMe PCIe SSD Motherboard Internal Storage Expansion

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- Horizontal layout design, saves vertical space inside compact chassis
- PCIe 4.0 x4 bandwidth up to 64Gbps, backward compatible with PCIe 3.0
- Only fits M.2 M-Key 2280 NVMe PCIe SSD, SATA M.2 SSD not supported
- Native bridge-free pass-through signal, no extra driver required
- Connects U.2 SFF-8639 NVMe SSD via separate SFF-8643 to SFF-8639 cable

Overview

Specs

Reviews

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AJMRTC horizontal M.2 to SFF-8643 adapter converts motherboard M.2 M-Key slot into SFF-8643 Mini SAS HD port for U.2 SFF-8639 NVMe SSD. It adopts horizontal PCB structure to avoid height conflict in small cases. It is a passive signal pass-through board, the actual speed depends on the M.2 slot specification of your motherboard. SFF-8643 to SFF-8639 cable is not included. Great for workstation, NAS and server internal storage expansion.

Specifications

Brand: AJMRTC
Model: AM-M28643-H2280
Host Interface: M.2 NGFF M-Key
Output Port: SFF-8643 (Mini SAS HD)
Supported SSD Size: 2280mm
PCIe Version: PCIe 4.0 x4, backward compatible PCIe 3.0
Form: Horizontal installation type
Supported Drive: U.2 SFF-8639 NVMe PCIe SSD
Unsupported: SATA M.2, B key / B+M key SSD
Feature: Passive signal pass-through, no chip
Application: Motherboard internal expansion, Workstation, NAS, Server

Additional Information
First Listed on Newegg	October 29, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

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Return Policies

Return for refund within: 30 days
Return for replacement within: non-replaceable
This item is covered by ‌ConnectFlow USA Return Policy

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Item#: 9SIC9FFM9N0166