QNAP TS-1655-8G-US review

The QNAP TS-1655-8G-US is a tower NAS for a team that can use a large hybrid SATA layout but does not need more than 2.5GbE on any single built-in Ethernet port. QNAP’s U.S. product page describes the TS-1655 as a business-oriented 16-position system with an eight-core Atom processor and support for both QTS and QuTS hero. The manufacturer’s English-U.S. guide identifies the ordering part as TS-1655-8G, while the U.S. Official Store names the exact package TS-1655-8G-US. This is a documentation-based assessment, not a hands-on test.

Sixteen positions, but two kinds of SATA bay

The number is not sixteen interchangeable hard-drive trays. QNAP lists twelve 3.5-inch SATA positions plus four 2.5-inch SATA positions. The larger trays support 3.5-inch SATA hard drives and 2.5-inch SATA SSDs; the four smaller bays are specified for 2.5-inch SATA SSDs. That layout allows a buyer to plan a large HDD group alongside a smaller SATA flash group, but the source does not make those groups equivalent. Decide which capacities, performance roles and RAID groups belong in each before ordering drives.

Two internal M.2 2280 PCIe Gen 3 x2 slots are separate from the sixteen SATA bays. QNAP describes those sockets for NVMe cache, a storage pool, or a QuTS hero system-drive arrangement; it also names an Edge TPU use. They are not front trays, do not make the NAS an 18-bay SATA system and are not listed as hot-swappable. QNAP’s guide calls out M.2 SSDs as an exception to drive hot-swap support. The exact models, firmware and use of any M.2 device still need to be checked against QNAP’s compatibility information.

QNAP’s package list names the NAS, one power cord, a Cat5e cable, the twelve 3.5-inch and four 2.5-inch trays, drive screws, tray keys and a quick-install guide. It does not list data drives or a pre-built storage array. The distinction matters: the chassis provides positions, not usable capacity. Check the full drive model and firmware for each intended SATA or NVMe device on the current compatibility list; I did not verify a drive-specific compatibility row for this assessment.

Built-in network ceiling and optional expansion

The TS-1655 has two built-in 2.5GbE RJ45 ports. They negotiate with slower network links, but the fastest individual built-in port is still rated 2.5 Gbps. That can suit a home office or workgroup whose switch, client and wiring support multigigabit Ethernet; it does not meet a requirement for one built-in 10GbE port. QNAP lists port trunking and failover, but two separate connectors are not a guarantee of one faster client connection or a particular file-transfer rate.

There are three PCIe Gen 3 x4 slots, and QNAP describes optional network adapters for 5, 10 or 25GbE. That creates an upgrade path, not an as-shipped port: an expansion card has to be bought, checked for model and slot compatibility, installed, and paired with a suitable switch or direct-connected client and cabling. A faster adapter can also occupy a slot that might otherwise serve a storage or other expansion card. If your essential filter is “at least one built-in 10GbE port,” do not count this optional path as meeting it.

QNAP’s page publishes laboratory transfer results, but those results depend on specified drive, RAID, host and network arrangements. They are not measurements of this review, and they do not predict a diskless package’s performance on an unspecified client path. A 2.5GbE link rating is one part of the path; drive choices, storage layout, client interface, switch, cable, protocol and workload all affect observed transfers.

Choose one software profile and plan the mirror yourself

The QNAP U.S. software page exposes QTS and QuTS hero as separate profiles. QTS uses EXT4; QuTS hero uses ZFS. The current eight-bay-and-larger RAID tables for both list RAID 1, so the exact sixteen-position model supports a documented way for an owner to create a two-drive mirror under either chosen environment. These are alternatives, not two systems running on the same pool. QuTS hero also calls for more system resources than QTS for some features, so check the memory needs of the intended applications rather than treating the operating-system choice as cosmetic.

Neither profile means a mirror is already configured. The buyer must select compatible drives, choose one OS, create the storage pool and decide where the rest of the bays go. Two selected SATA drives can form a RAID 1 set; that may preserve availability after one member-drive failure, but it does not protect against accidental deletion, malware, theft, site damage or every system failure. Keep a separate backup on another device or location and test restoration. A mirrored pair is only one part of a storage plan.

The 8G base profile has one 8 GB DDR4 UDIMM. QNAP lists four memory slots, a 128 GB maximum and ECC memory support, while its guide tells buyers to use QNAP modules with matching specifications. The factory stick is described as non-ECC; do not assume any third-party module will work or mix modules without checking QNAP’s requirements. The Intel Atom C5125 is an eight-core 2.8 GHz processor. Those are useful documented platform facts, not an independent workload benchmark.

A substantial tower, not a short-depth rack unit

The guide identifies a tower enclosure measuring 11.59 × 14.56 × 12.59 inches (H × W × D), with a listed net weight of 29.01 pounds and a 550 W power supply. These figures help screen a shelf or work area, but they are not required ventilation clearance or evidence of measured power draw. Plan space for cable bend, airflow, tray access and safe handling. A single listed power supply also differs from a redundant-supply rack design.

That form factor separates it from QNAP’s similarly named TS-h1655XeU-RP. The TS-1655 is a tower with sixteen native SATA positions and two built-in 2.5GbE ports; the TS-h1655XeU-RP-8G-US is a 3U short-depth rack system with twelve native SATA positions, separate E1.S/M.2 PCIe positions, built-in 10GbE and two power supplies. The rack model’s extra NVMe positions do not make them SATA bays, and the tower model does not gain 10GbE from its optional-card path. Confirm which chassis and exact suffix are on a quote—the similar names conceal different installation and networking choices.

Who should shortlist this exact package?

The TS-1655-8G-US is worth evaluating when sixteen native SATA locations—including four 2.5-inch SSD-only positions—are useful, a tower fits the room, and built-in 2.5GbE is sufficient for the network requirement. The two M.2 sockets, three PCIe slots, four memory slots and two OS choices provide flexibility, but every expansion and storage decision brings its own compatibility check. A buyer seeking built-in 10GbE, a compact desktop chassis, rack rails in the box, all-SATA interchangeable positions or a ready-populated mirror should compare another configuration instead.

Before committing, confirm the exact TS-1655-8G-US identifier and the seller’s written contents; check every intended drive and firmware against QNAP’s live list; choose QTS or QuTS hero and verify application memory requirements; map a single 2.5GbE link through the client, switch and cable; and reserve PCIe slots for the actual expansion plan. Verify the intended room’s ventilation and power as well. These are document checks still to make, not tests performed here.