QNAP ASISP55 TVS-673e 64GB 4TB SSD 48TB HDD NAS

Name: QNAP ASISP55 TVS-673e 64GB 4TB SSD 48TB HDD NAS
Brand: QNAP
SKU: ASISP55

Overview

The QNAP TVS-673e is a 6-bay tower NAS built around the AMD RX-421BD quad-core APU — an x86 processor that fundamentally separates this unit from the ARM-based NAS market. At 2.1GHz base with a 3.4GHz turbo boost, the RX-421BD can sustain genuine multitasking: running virtualized workloads in QNAP's Virtualization Station, executing Docker containers through Container Station, processing surveillance feeds in QVR Pro, and serving files across four simultaneous 1GbE client connections — all at the same time without CPU starvation. The 64GB DDR4 at 2400MHz means those VMs have real working memory, not the 4–16GB ceiling that constrains ARM-based NAS units positioned as VM hosts. The storage configuration in this bundle — 4TB across two M.2 SSDs plus 48TB across six 8TB SATA HDDs — feeds directly into QNAP's Qtier automatic tiering, which promotes hot data to flash latency and moves cold data to the high-density HDD pool transparently.

This unit is built for small businesses and remote offices that have outgrown simple NAS file sharing but aren't ready to commit to dedicated server infrastructure. A typical deployment might run a shared file server for 15–30 users on the HDD pool, host a domain controller or internal application VM on the SSD tier, run a 4–8 camera surveillance system simultaneously, and still have headroom for scheduled backup jobs. The dual HDMI outputs allow direct display connection for local administration or digital signage without a separate workstation. Where the TVS-673e reaches its limits is network throughput: the 4 x 1GbE ports support link aggregation, but saturating the M.2 SSD tier requires a 10GbE PCIe expansion card — a realistic upgrade path given the available PCIe slots, but not included at base configuration. Plan the network upgrade alongside the initial deployment if SSD-tier throughput is a primary workload requirement.

Key Features

QNAP Turbo NAS TVS-673e is a high-performance, versatile and energy-efficient 6 bay tower storage system for small businesses and remote offices

Access all of the features of your NAS including applications, multimedia content, cross-platform file sharing, host virtual machines, convert and store files, create your own surveillance station, and much more with QNAP QTS 4.3 operating system

Expand your storage and connectivity options with 4 x USB 3.0, 2 x HDMI, 4 x 1GbE (RJ-45) Ports; Get powerful performance with AMD RX-421BD Quad-Core 2.1GHz processor; Multitask with ease with 64GB DDR4 memory; Store plenty of data with 4TB (2 x 2TB) SSDs for ultra fast storage and 48TB (6 x 8TB) SATA HDDs for high capacity storage

QNAP NAS chassis comes in a sealed box.

Hard drives and memory upgrades included separately NOT installed, installation required.

Specifications

Brand

QNAP

Model

ASISP55 / TVS-673e

Form Factor

Tower, 6-Bay + 2 PCIe M.2 Slots

Processor

AMD RX-421BD Quad-Core 2.1GHz (Turbo 3.4GHz)

RAM

64GB DDR4 PC4-19200 2400MHz SODIMM

SSD Storage

4TB (2 x 2TB M.2 Solid State Drives)

HDD Storage

48TB (6 x 8TB 6Gb/s SATA 3.5")

Graphics

Embedded AMD Radeon R7

Network Ports

4 x 1GbE (RJ-45)

USB Ports

4 x USB 3.0

Display Ports

2 x HDMI

Operating System

QNAP QTS 4.3

ASIN

B08586WWB3

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Pros & Cons

👍 Pros

AMD RX-421BD quad-core x86 processor enables native VM hosting and Docker on QTS 4.3 — a capability unavailable on ARM-based NAS platforms at this price range.
64GB DDR4 at 2400MHz provides enough working memory to run multiple hosted VMs and containerized applications simultaneously without memory pressure.
Dual-tier storage architecture — 4TB M.2 SSD plus 48TB SATA HDD — allows Qtier auto-tiering to deliver SSD-class latency on hot data while keeping cost-per-terabyte low across the full 52TB pool.
4 x USB 3.0 and 2 x HDMI ports, plus 4 x 1GbE ports, give the TVS-673e direct display and multi-client network access without additional infrastructure.
PCIe expansion slots allow 10GbE or additional NVMe to be added later as throughput requirements grow.

👎 Cons

4 x 1GbE networking creates a hard throughput ceiling — aggregated link bonding can reach ~4Gbps, but a single client connection is limited to 1Gbps, which is a bottleneck for large sequential read/write workloads to the SSD tier without a 10GbE upgrade card.
Drives ship uninstalled and require physical setup — this is not a turnkey deployment; factor in configuration time for drive installation, RAID volume creation, and QTS setup.
QTS 4.3 is not the current QTS generation; verify application compatibility and available update path before deploying in an environment dependent on specific third-party QNAP app ecosystem packages.
Tower form factor with six 3.5-inch bays and a full PCIe expansion chassis has significant physical footprint — not suitable for rack-mount deployments without a separate rail kit.
The embedded Radeon R7 GPU is not suitable for sustained parallel 4K transcoding workloads; media-heavy environments will hit GPU limits before storage limits.

Frequently Asked Questions

Do the hard drives and SSDs come pre-installed?

No. The TVS-673e chassis ships sealed, with the 4TB SSDs (2 x 2TB M.2) and 48TB HDDs (6 x 8TB SATA) listed in this bundle included separately and requiring installation. Physical drive installation is required before first use — QNAP's QTS setup wizard guides volume configuration after drives are seated.

What processor powers this NAS and what does that mean for multitasking workloads?

The AMD RX-421BD is a quad-core APU clocked at 2.1GHz with a 3.4GHz turbo. It is an x86 processor, which matters significantly — x86 architecture enables native virtual machine hosting, Docker container execution, and full application compatibility on QTS 4.3. ARM-based NAS units cannot match this for running simultaneous services like a surveillance station, file sharing, and a hosted VM concurrently.

What is the purpose of having both M.2 SSDs and SATA HDDs in this configuration?

The 4TB of M.2 SSD storage (2 x 2TB) is suited for high-IOPS workloads — database caches, VM storage, or Qtier auto-tiering where hot data is promoted to flash. The 48TB of SATA HDD capacity handles bulk storage, backup targets, and archival data. Running both tiers simultaneously allows QTS's Qtier to automatically migrate frequently accessed files to SSD and cold data to HDD, optimizing both performance and cost-per-gigabyte.

How many simultaneous 4K video streams can the embedded Radeon R7 GPU handle for transcoding?

The AMD RX-421BD's embedded Radeon R7 graphics support hardware-accelerated transcoding in QNAP's multimedia applications. Actual concurrent 4K stream count depends on codec (H.264 vs H.265), target bitrate, and whether transcoding or direct play is used — QNAP's Plex and Video Station apps leverage this GPU for hardware acceleration, but the embedded GPU is not intended for heavy parallel transcoding workloads typical of a dedicated media server.

Is 64GB of RAM upgradeable, and what are the expansion options?

The 64GB DDR4 configuration uses SODIMM slots. Whether this specific bundle's configuration represents the maximum supported capacity should be verified against QNAP's official TVS-673e memory compatibility list. Additionally, the TVS-673e includes PCIe expansion slots, allowing 10GbE networking or NVMe expansion cards to be added as workload demands grow.