QNAP TS-253D NAS review: 2.5GbE, PCIe expansion, and HDMI output make for a kickin' home server

This handsome NAS box offers dual 2.5GbE ports and a PCIe slot for adding 10GbE, SSDs, or both. It can also play multimedia directly to an attached 4K display.

qnap ts253d front

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At a Glance
  • QNAP TS-253D NAS box (two-bay, unpopulated)

QNAP’s $469 TS-253D is the second NAS box sporting dual 2.5GbE ports we’ve tested, butting heads with Asustor’s fast, easy, and surprisingly powerful $300 AS5202T. Having 2.5GbE makes a huge difference in performance, dramatically increasing the number of devices you can simultaneously stream to or back up.

You’ll immediately notice that the TS-253D is considerably pricier than its rival, but QNAP’s box features a PCIe slot for adding features such as 10GbE and NVMe SSDs, and it makes far better use of an external display attached to its HDMI port.

How so? the QNAP can play movies, run slideshows, let you browse the internet—heck, it can even function as a lightweight workstation. The Asustor simply shows an administrative command line.

This review is part of TechHive’s coverage of the best NAS boxes for media streaming and client backup, where you’ll find reviews of competing products, plus a buyer’s guide to the features you should consider when shopping.

Design and specs

The QNAP TS-253D-4G that I tested is approximately 6.6 inches deep, 4.1 inches wide, and 8.9 inches tall. It’s a two-bay, tower-orientation NAS box boasting a very attractive industrial design. There’s a latching, slide-away cover over the drive bays which feature quick-change, pressure-fit trays. The trays have tool-less snap-in rails for mounting hard drives, but you’re back to screws for installing SSDs like the ones I used for benchmarking.

There are power and quick-copy buttons on the front of the box, along with a USB port and status lights for power as well as LAN and drive activity. Dual 2.5GbE ports ports are around back, along with four more USB ports and HDMI for direct output to up to a 4K display (that’s true 4K, by the way: 4096 x 2160 pixels). You’ll also find a recessed reset button and a Kensington lock port here.

qnap ts253d rear panel QNAP

The QNAP TS-253D is outfitted with three USB 2.0 ports and two USB 3.2 Gen 1 ports. It will support USB 3.2 Gen 2 (10Gbps) with an optional expansion card.

There’s a quad-core Intel J4125 Celeron processor inside the TS-253D-4G, along with with 4GB (the 4G in the name) of DDR4 memory in one of its two SODIMM slots. There’s also the aforementioned x4 PCIe slot for expansion cards that allow you to add 10GbE, or M.2 SSDs (SATA or NVMe). QNAP sells a number of add-in cards for this slot, which you can peruse at QNAP’s Amazon storefront. Fair warning: None of these components are what most people would call inexpensive.

OS and apps

QNAP’s hardware is generally top-notch, and the company pairs it with its excellent QTS operating system—one of the first with what is now a de rigueur windowed-OS-in-a browser HTML interface. It’s impressive, if not as well-organized as some. You can experience it at this link

qnap qts2 IDG

QNAP’s QTS configuration interface, accessed from a browser, is elegant and generally easy to use. It’s not the best organized we’ve seen, but it’s fun to use.

The app selection is voluminous. For starters, there’s a very competent DLNA server for streaming content off of the box. Plex, with its broader and fancier media streaming support, is also available. Even TVs with poor or no in-house media players feature Plex. Roon server is available for those that who CD-quality music streamed from the box. QNAP also offers a number of its own proprietary multimedia apps for not only its NAS boxes, but also for macOS and Windows computers as well as iOS and Android mobile devices.

QNAP’s Hybrid Backup Sync is powerful and versatile, if not the most intuitive backup program in the consumer NAS world. It handles backups to the box from other sources, backups from the box to other destinations, and it will sync with various online storage services. It will do this via SMB, FTP, Rsync, and other protocols, which means you can back up your client computers without installing additional software on them. Hybrid Mount is a new addition to this feature set that lets you mount online sources as local drives. Acronis True image and several other utilities are available as well.

QNAP has app solutions for video surveillance, mail hosting, and content management, too. I used to recommend using the company’s WordPress app, but it’s now so far behind the upgrade and security curve that my last attempt serving my own website from a QNAP box ended in a ransomware attack.

You can also use Virtualization Station on the QNAP TS-253D to host virtual machines, and there are versions of Libre Office, Spotify, the aforementioned Roon Server, and lots of other good stuff available. You can delve into the entire ecosystem at the company’s online app center.  

Direct video output

As I said up top, the TS253D makes far better use of its HDMI port than the recently reviewed Asustor AS5202T, which could be extremely handy if you’re pressed for space, as in a dorm room or micro apartment. 

qnap qts1 IDG

These are some of the apps you can use when employing the TS-253D’s HDMI output to drive a direct-attached display.

You can play movies, display slideshows, stream music, and browse the web. With a keyboard and mouse plugged in, you can even use Libre Office. Some of the available direct-attached apps are shown in the above screen capture.

The TS-253D also supports TV tuners and remote-control units, so you can use the box as an ad hoc TV if you’re of a mind to. 


Having 2.5Gbps ethernet makes a real difference in sustained throughput. Where the maximum from a gigabit box is around 119MBps, the TS-253D clocked nearly 300MBps both reading and writing with two SSDs running in RAID 0, and nearly the same in the mirrored RAID 1 you should use to safeguard important data. 

cdm sequential ts253d IDG

There’s little difference in sequential throughput between the TS-253D and the Asustor AS5202T when using a single 2.5GbE ethernet port.

Note that the Asustor AS5202T did see an change in performance when ports were aggregated in round-robin mode. Reads jumped about 50Mbps, but writes declined by about the same amount. Aggregating ports on the TS-253D made little to no differences in the modes available. I had no switch capable of the true 802.3ad that QNAP supports, and that might increase performance. I will say that port-trunking (aggregation) on the TS-253D was painless; it has not always been so with QTS in the past. 

cdm 4k ts253d IDG

When it came to random writes, the TS-253D had it all over the Asustor AS5202T. This means it can handle multiple write requests from multiple clients more quickly than the Asustore can.

Note that 2.5GbE is actually capable of an additional 80MBps or so in throughput with boxes that have more bays and therefore drives to distribute data across.   

Note: testing was performed on Windows 10 64-bit running on a Core i7-5820K/Asus X99 Deluxe system with four 16GB Kingston 2666MHz DDR4 modules, a Zotac (NVidia) GT 710 1GB x2 PCIe graphics card, and an Asmedia ASM2142 USB 3.1 Gen 2 (10Gbs) card. Also on board are a Gigabyte GC-Alpine Thunderbolt 3 card. A QNAP QNA-T310G1S Thunderbolt 3 to 10GbE adapter and a Zyxel XGS1210-12 10GbE/2.5GbE/gigabit switch were used for testing.

Great if you need all the features

I really love this box. I love its looks, its snappy handling, and its excellent 2.5GbE performance. It’s faster, more refined, and has more features than the Asustor AS5202T. If you’ve got the money, I’m pretty sure you’ll love it too.

If you don’t need the TS-253D’s PCIe slot, on the other hand, or its direct-attached multimedia functionality, opting for the Asustor AS5202T would leave you very nearly as well off—and you’d retain a bit of your wealth, too.

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At a Glance
  • This top-notch 2-bay box sports 2.5GbE, a PCIe expansion slot, and HDMI output for up to a 4K display. It doesn't get much better, but you pay for the privilege.


    • Two fast 2.5Gbps ethernet ports
    • Great operating system and app ecosystem
    • PCIe expansion slot


    • More expensive than competitors that don't have PCIe slots
    • Add-in cards are pricey (if you need them)
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