QNAP

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

4.5 (351 reviews)
PCIe Gen3

Add up to four M.2 NVMe SSDs to your QNAP NAS or PC with this PCIe Gen3 x8 expansion card for serious storage acceleration.

$173.25*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The QNAP QM2-4P-384 is a PCIe expansion card that allows you to install up to four M.2 2280 NVMe SSDs into a single PCIe slot, making it an efficient way to add high-speed SSD storage or caching capability to compatible QNAP NAS units or standard PCs. The card connects to the host system through a PCIe Gen3 x8 interface, distributing bandwidth across four M.2 slots, each running at PCIe Gen3 x2. This architecture provides strong aggregate throughput while keeping the card's physical footprint compact.

Flexibility is built into the design with three included bracket options: a pre-installed low-profile bracket, a low-profile flat bracket, and a full-height bracket. This ensures the card fits into a range of chassis types, from compact NAS enclosures to standard desktop towers. The card focuses purely on PCIe NVMe drives in the 2280 form factor, so SATA M.2 drives are not supported. For QNAP NAS users, the QM2-4P-384 is particularly useful for enabling SSD caching to accelerate read and write performance on traditional hard drive storage pools, delivering noticeable responsiveness improvements for frequently accessed data.

Key Features

Connector: 4 x M.2 2280 PCIe (Gen3 x2) NVMe SSD slots

PCIe and Lanes: PCIe Gen3 x4

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

Specifications

Brand
QNAP
Model
QM2-4P-384
M.2 Slots
4 x M.2 2280 PCIe (Gen3 x2) NVMe
Host Interface
PCIe Gen3 x8
Default Bracket
Low-profile
Included Brackets
Low-profile, low-profile flat, full-height
SSDs Included
No

Pros & Cons

👍 Pros

  • Supports four M.2 NVMe SSDs on a single card, consolidating storage expansion into one slot
  • Includes low-profile and full-height brackets for flexible installation in different enclosures
  • PCIe Gen3 x8 host interface provides ample aggregate bandwidth for multiple drives
  • Straightforward installation with no additional power connectors required

👎 Cons

  • Each M.2 slot is limited to PCIe Gen3 x2, which caps individual drive performance below their maximum potential
  • Only supports 2280 form factor M.2 drives, excluding shorter 2242 or 2230 SSDs
  • SSDs must be purchased separately, increasing the total cost of the upgrade
  • PCIe Gen3 interface may be a limitation for users with Gen4 or Gen5 capable systems seeking maximum throughput

Frequently Asked Questions

The QM2-4P-384 supports up to four M.2 2280 PCIe NVMe SSDs simultaneously.
The card uses a PCIe Gen3 x8 host interface. It should be installed in a compatible PCIe x8 or x16 slot.
No, M.2 SSDs are not included and must be purchased separately.
The card comes with a low-profile bracket pre-installed, and also includes a low-profile flat bracket and a full-height bracket so it can fit different chassis form factors.
Each of the four M.2 slots operates at PCIe Gen3 x2, sharing the total bandwidth of the PCIe Gen3 x8 host connection.