Install an M.2 PCIe 4.0 NVMe SSD in a U.2 PCIe NVMe SSD slot for PC and NAS

The QDA-UMP4 allows installing an M.2 PCIe 4.0 x4 NVMe SSD in a 2.5-inch U.2 (SFF-8639) PCIe 4.0 x4 NVMe SSD drive bay. No extra software or drivers are required for the QDA-UMP4 and it can be installed in a PC/workstation (Windows®, Linux®) or QNAP NAS to enable using M.2 SSDs as cost-effective alternatives to expensive U.2 SSDs.


Use an M.2 2280 (M key) PCIe NVMe SSD in a U.2 PCIe NVMe SSD drive bay (M.2 SSD sold separately).


Up to PCIe 4.0 x4 file transfer speeds.
(Compatible with NVMe PCIe 3.0 for M.2 SSDs and U.2 drive bays)

Architecture diagram

High-quality construction for better heat dissipation

The M.2 SSD thermal pads and aluminum-alloy metal frame assist in dissipating heat from the M.2 SSD to ensure high performance.

Install in a PC/workstation for higher performance with lower costs

By using the QDA-UMP4 to install a M.2 SSD in the 2.5-inch U.2 SSD tray of a high-end PC/workstation (Windows® or Linux®), you can obtain a more budget-friendly way to supercharge bandwidth-demanding applications (such as on-the-fly video editing, server-grade applications, or online gaming). The status of the installed SSDs can be monitored using your preferred monitoring tool (such as manufacturer-provided utilities or third-party software like CrystalDiskInfo).

Note: Consult your PC system provider regarding compatibility with U.2 NVMe SSD.

Install in QNAP NAS for efficient yet cost-effective storage

By allowing you to use M.2 SSDs instead of U.2 SSDs, the QDA-UMP4 enables you to optimize data-intensive applications in more cost-effective way. It can also boost IOPS performance when configuring SSD caching. Users can monitor drive health and manage SSD usage from the QTS Storage & Snapshots Manager.

1. The QNAP NAS requires QTS 4.4.1 / QuTS hero h4.5.1 (or later).
2. QTS / QuTS hero identifies a QDA-UMP4 as a single volume (no matter if one or two drives are installed).
3. When using Qtier in QTS with an HDD storage pool using RAID protection (such as RAID 1/5/10), then two SSDs are required in the SSD pool (for example, two QDA-UMP4, or one SSD plus one QDA-UMP4)
4. If a drive installed in the QDA-UMP4 must be replaced, you must disable Qtier to make the QDA-UMP4 drive data move to the NAS-based storage pool, and then replace the QDA-UMP4 drive.

Maintain high performance with cost savings

Using the QDA-UMP4 enables using M.2 NVMe SSDs as alternatives to U.2 NVMe SSDs, ensuring high-level performance at a more cost-effective price point.

M.2 NVMe SSD Performance on QDA-UMP4 with AJA System Test


5381.8 MB/s


2423.8 MB/s

Tested in QNAP Labs. Figures may vary by environment.

NAS: TDS-h2489FU
Intel® Xeon® Silver 4314 2.40 GHz CPU; 128GB RAM; QuTS hero h5.0; QDA-UMP4; Seagate IronWolf 525 2TB M.2 NVMe SSD

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