Asustor AS5402T Review: Fast Flash NAS

Two-bay network storage boxes have a reputation for being slow, plasticky, and stingy with expansion. The Asustor AS5402T takes a different approach by pairing those two drive bays with four M.2 NVMe slots and a pair of 2.5GbE ports. That turns a modest enclosure into something closer to a small flash server.

This Asustor AS5402T review focuses on what that hardware combination buys you in practice: six total storage devices, link-aggregated 2.5-gigabit networking, and an Intel quad-core chip capable of hardware-accelerated 4K transcoding.

It ships diskless with 4GB of DDR4 running at 2933 MHz, expandable to 16GB, plus HDMI 2.0b output and USB 3.2 Gen 2 ports. Asustor backs it with a three-year warranty and runs its own ADM operating system.

Bottom Line

For anyone who wants NVMe speed and multi-gig networking without stepping up to a four-bay tower, the AS5402T covers a lot of ground for its size.

Check current availability and pricing for the Asustor AS5402T on Amazon.

Asustor AS5402T Overview

The Nimbustor Gen2 line targets users who want more storage flexibility than a standard two-bay box allows. Measuring roughly 9.06 x 4.49 x 6.69 inches and weighing about 1,500 grams empty, it sits comfortably on a desk or shelf.

Specification	Detail
CPU	Intel N5105 quad-core, 2.0 GHz
Memory	4GB DDR4-2933, up to 16GB
Drive bays	2x 3.5″ SATA
M.2 slots	4x NVMe
Network	2x 2.5GbE
Video	HDMI 2.0b, 3840×2160
USB	3 ports, USB 3.2 Gen 2
OS	ASUSTOR Data Master (ADM)
Warranty	3 years

Mounting hardware, screws, a power adapter, and an Ethernet cable come in the box.

Intel N5105 Processing Power

Four Jasper Lake cores at 2.0 GHz handle the workloads most home and small-office users throw at a NAS. File serving over SMB, scheduled backups from multiple machines, and container workloads run without the CPU becoming the bottleneck.

The integrated graphics matter more than the clock speed here, since they carry hardware transcoding duty. Virtualization is supported, though 4GB of RAM limits how far you can push it before an upgrade becomes necessary.

Power draw stays low, which suits a device meant to run continuously. For comparison shopping across similar hardware, our broader tech reviews cover adjacent products.

Four M.2 NVMe SSD Slots

Four NVMe slots on a two-bay chassis is unusual, and it opens up configurations most competitors can’t match. You can build an all-flash volume across the M.2 drives, use them as a read/write cache in front of spinning disks, or split the difference.

One owner reported running four 2TB NVMe drives in RAID 6 alongside a mirrored pair of 10TB hard drives, serving both SMB and Apple File Protocol clients from the same box.

If you’re choosing drives, our roundup of the best NVMe SSD options is a reasonable starting point. Amazon shoppers often pair a unit like this with a Corsair MP600 Mini 2TB Gen4 SSD.

Dual 2.5GbE Networking

Two 2.5-gigabit ports lift the ceiling well past what single gigabit allows, delivering roughly 280 MB/s per link under favorable conditions. Link aggregation combines them for multi-client environments, or you can assign each port to a separate subnet.

Your switch and client machines need to support 2.5GbE to see the benefit. Users upgrading from older gigabit enclosures consistently note the transfer speed difference as the most immediate change.

If your existing wiring is the constraint, a 2.5Gbps Ethernet over coax adapter can bridge the gap without running new cable.

4K Media Streaming and HDMI Output

HDMI 2.0b output at 3840×2160 lets the unit drive a display directly, running ADM’s local interface or a media player without a client device in between. That’s a feature Synology dropped from most of its lineup.

Hardware transcoding through the N5105’s integrated graphics handles Plex streams to phones, tablets, and smart TVs that can’t play the source format natively. Direct 4K playback works cleanly to a connected screen.

For running video to a TV in another room, a wireless HDMI extender is a practical companion.

Pros and Cons

Pros

• Four M.2 NVMe slots plus two SATA bays in a compact chassis
• Dual 2.5GbE ports with link aggregation support
• HDMI 2.0b output for direct display connection
• Hardware transcoding for 4K Plex libraries
• Memory expandable to 16GB
• Three-year manufacturer warranty
• Strong feature density for the price bracket

Cons

• Ships with only 4GB RAM, which limits virtualization out of the box
• Diskless, so drives add meaningfully to total cost
• Initial RAID build takes days on large arrays
• ADM has a smaller third-party app ecosystem than Synology’s DSM
• 2.5GbE benefits require compatible switch and client hardware

What Customer Reviews Reveal

Owners migrating from Synology make up a noticeable share of the feedback, and most cite that vendor’s hard drive restrictions and hardware value as the reason for switching. Several describe the AS5402T’s spec sheet as unexpected at this price level.

Reported configurations vary widely. RAID 1 across two large drives is common for straightforward redundancy, while more ambitious setups combine NVMe RAID 6 with mirrored high-capacity hard drives.

Setup difficulty is described as manageable rather than trivial. Buyers replacing aging enclosures, including older D-Link ShareCenter units that required downgrading Windows SMB to version 1.0, report smoother connectivity and faster transfers.

International reviews in German, Swedish, French, and Japanese are consistently positive. The Japanese feedback specifically praises the M.2 support and the breadth of backup tools covering everything from desktops to phones.

Conclusion

The AS5402T earns its place for buyers who want NVMe capacity and 2.5-gigabit networking in a footprint smaller than a four-bay tower. Six storage devices in one enclosure is a genuinely uncommon layout at this size.

Budget for a RAM upgrade if you plan to run virtual machines or several containers at once, since the stock 4GB fills quickly under that load. Pairing the M.2 slots with high-capacity NAS-grade drives such as the Toshiba N300 8TB gives you both fast tiers and bulk archive space.

Confirm your switch supports 2.5GbE before ordering, or the networking advantage will sit idle.

Frequently Asked Questions

Does the Asustor AS5402T include storage drives?

No, the unit ships diskless. You supply your own 3.5-inch SATA drives for the two bays and M.2 NVMe modules for the four slots, which lets you match capacity and drive class to your workload.

How easy is the Asustor AS5402T to set up?

Initial configuration through ADM is straightforward for anyone who has set up a NAS before, and owners describe the process as reasonable without being effortless. Building large RAID arrays runs in the background and takes a couple of days on high-capacity volumes.

Can the Asustor AS5402T run Plex with 4K video?

Yes, the Intel N5105’s integrated graphics provide hardware transcoding for Plex, and the HDMI 2.0b port outputs 4K at 3840×2160 directly to a display. Transcoding performance holds up for typical home library use with a small number of concurrent streams.

Can the Asustor AS5402T memory be upgraded?

Yes, the stock 4GB of DDR4-2933 can be expanded to 16GB. Adding memory is worthwhile if you run virtual machines, multiple Docker containers, or large indexing operations across a full array.

Is the Asustor AS5402T suitable for gaming and live streaming?

It works well as centralized storage for game libraries and recorded stream footage, particularly with NVMe drives and 2.5GbE feeding your workstation. The NAS stores and serves files; the encoding for a live broadcast still happens on your streaming PC.

Is the Asustor AS5402T secure for home backups?

ADM includes RAID redundancy, snapshot support, and encrypted shared folders. Owners use it to back up Windows PCs, Macs, tablets, and phones.

It’s still wise to pair local redundancy with an offsite or cloud copy, since RAID protects against drive failure, not fire, theft, or ransomware.