QNAP QM2-4P-384 Quad M.2 NVMe PCIe Gen3 SSD Expansion Card
Overview
The QM2-4P-384 is a quad-slot M.2 NVMe SSD expansion card for QNAP NAS systems, designed to add four M.2 2280 PCIe NVMe drives to units that otherwise lack dedicated NVMe bays. The card connects via PCIe Gen3 x8, delivering enough bandwidth headroom to run all four slots simultaneously without saturating the interface — relevant when you're configuring SSD caching for a high-workload NAS or building a dedicated all-flash caching pool to accelerate spinning-disk volumes. Deployments that benefit most: surveillance NAS nodes with heavy concurrent write streams, or enterprise NAS used for virtualization where latency on random I/O is the bottleneck. Once installed, QTS and QuTS hero expose the drives for SSD caching, a caching pool, or an auto-tiering volume — no extra licensing step required.
Compatibility
Designed for QNAP NAS models with a compatible PCIe expansion slot. The card accepts four M.2 2280 form-factor NVMe SSDs only (PCIe Gen3 x4 per slot); M.2 SATA drives are not supported. Verify your NAS model's PCIe slot width and available lanes before ordering — the card occupies a PCIe Gen3 x8 slot. Compatible with the QNAP NAS lineup supporting QTS or QuTS hero firmware with SSD cache or auto-tiering features enabled. For pairing with a QNAP network attached storage system optimized for surveillance workloads, cross-reference QNAP's compatibility list for your specific NAS model and chassis. Bracket options support both low-profile (default, included) and full-height chassis installations — confirming your chassis clearance before installation avoids a wasted trip.
Installation Notes
The card ships with a low-profile bracket pre-installed; a full-height bracket is also included for standard ATX-style NAS chassis. Seat the card firmly into the PCIe Gen3 x8 slot and secure the bracket before inserting M.2 SSDs — installing drives before seating the card risks misalignment. NVMe SSDs are not included. After physical installation, initialize drives through the QTS or QuTS hero storage management interface to assign them to a cache or tiering role. For guidance on sizing your SSD cache relative to working-set data, review a storage planning resource before committing drive capacity.
