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QNAP QM2-4P-384 Quad M.2 PCIe SSD Expansion Card
QNAP QM2-4P-384 Quad M.2 PCIe SSD Expansion Card
QNAP QM2-4P-384 Quad M.2 PCIe SSD Expansion Card
QNAP

QNAP QM2-4P-384 Quad M.2 PCIe SSD Expansion Card

★★★★★4.5 (351 reviews)
PCIe Gen2

Add up to four M.2 NVMe SSDs to your QNAP NAS or PC with a single PCIe expansion card.

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Overview

The QNAP QM2-4P-384 is a PCIe expansion card designed to add four M.2 2280 NVMe SSD slots to a compatible QNAP NAS or standard PC. By occupying a single PCIe Gen3 x8 slot, it allows you to install up to four NVMe drives for use as SSD caching volumes, storage pools, or high-speed tiered storage — all without sacrificing any of your existing 3.5-inch or 2.5-inch drive bays. The card supports RAID 0, 1, 5, and 10 on compatible QNAP systems, giving you the option to prioritize raw speed or data protection depending on your workload.

The card ships with a low-profile bracket pre-installed and includes both a low-profile flat and full-height bracket in the box, making it adaptable to rackmount NAS enclosures, compact PCs, and standard tower cases. Since the PCIe Gen3 x8 bus is shared across four slots, each drive receives roughly Gen3 x2 worth of bandwidth when all slots are populated — more than enough for caching duties but worth considering if you need maximum throughput from each individual SSD. No SSDs are included, so you will need to source compatible M.2 2280 NVMe drives separately. For QNAP NAS owners looking to accelerate random I/O or add an all-flash storage tier without a chassis upgrade, the QM2-4P-384 is a practical, space-efficient solution.

Key Features

Connector: 4 x M.2 2280 PCIe (Gen2 x4) NVMe SSD Slots

PCIe and lanes: PCIe Gen2 x8

Bracket: low-profile (default). low-profile flat and Full-height brackets are also included. * M.2 SSDs are not included as standard

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Specifications

Brand
QNAP
Model
QM2-4P-384
M.2 Slots
4 x M.2 2280 PCIe NVMe
Host Interface
PCIe Gen3 x8
RAID Support
RAID 0, 1, 5, 10
Bracket
Low-profile (pre-installed), low-profile flat and full-height included
SSDs Included
No

Pros & Cons

👍 Pros

  • Supports four M.2 NVMe SSDs on a single card, maximizing storage density per slot
  • Includes three bracket sizes to fit low-profile, flat, and full-height chassis
  • RAID 0, 1, 5, and 10 support provides flexibility for performance or redundancy configurations
  • PCIe Gen3 x8 interface delivers sufficient bandwidth for four concurrent NVMe drives

👎 Cons

  • Each M.2 slot runs at Gen3 x2 effective bandwidth when all four slots are populated, limiting individual drive speeds
  • M.2 SSDs are not included, adding significant cost to reach a working setup
  • Compatibility is primarily optimized for QNAP NAS units, and PC support may require additional configuration
  • No onboard heatsink, so sustained workloads on four drives may cause thermal throttling in confined enclosures

Frequently Asked Questions

The QM2-4P-384 supports up to four M.2 2280 PCIe NVMe SSDs simultaneously.
No, M.2 SSDs are sold separately. The card provides the slots and interface only.
It requires a PCIe Gen3 x8 slot (or compatible x16 slot) for full bandwidth. It uses a PCIe Gen3 x8 host interface.
Yes, the QM2-4P-384 supports RAID 0, 1, 5, and 10 across the installed M.2 drives when used in compatible QNAP NAS units.
A low-profile bracket is pre-installed, and both a low-profile flat bracket and a full-height bracket are included in the box for different chassis sizes.

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