QNAP TS-464U-8G-US four-bay 1U rack NAS review

Assessment basis: This is a source-based assessment of the exact U.S. TS-464U-8G-US configuration, not a hands-on test. QNAP's current selector lists the 8 GB profile as “since 2024/01”; the exact U.S. Store title supplies the -US identity, but no current price, stock or seller-added package is assumed.

A four-bay rack design with a clear ceiling

The TS-464U-8G-US is a one-rack-unit NAS built around four native 3.5-inch SATA positions and an Intel Celeron N5095 quad-core processor. QNAP lists four SATA drive bays, with support for 3.5-inch SATA hard drives and 2.5-inch SATA SSDs. The drives are not shown in the manufacturer package list, so count this as a diskless base, not a preconfigured array or a capacity figure. QNAP's product page also describes shared storage, backup and media features, but those are vendor statements rather than measured results on a real home or business network.

Four trays can be useful when you want more than a two-drive mirror without jumping immediately to a much larger chassis. The trade-off is literal: this unit cannot hold a fifth native drive. Its optional M.2 path uses a compatible PCIe adapter rather than built-in M.2 sockets, and an external expansion device would be a separate product. Neither should be counted as an additional internal bay. QNAP's current TS-464U compatibility list provides named 3.5-inch HDD and SATA SSD rows with model, capacity, interface and firmware; match the full row to the drive you plan to buy. This assessment does not select a drive. The list has no separate 2.5-inch HDD category, so its omission does not settle the older English-U.S. guide's 2.5-inch HDD wording. QNAP also repeats WD103KRYZ with conflicting family, capacity and firmware values; seek clarification rather than treating either as definitive if considering that model.

8 GB is a floor for one operating-system option

QNAP describes QTS as the default operating system and supports switching to QuTS hero from QTS 5.2.2. They use different filesystems—EXT4 for QTS and ZFS for QuTS hero—so they are choices, not modes to run simultaneously. Any migration should be planned as a data-protection event: verify the exact procedure, make a separate backup and do not assume existing storage can be carried across untouched.

This 8 GB configuration meets QNAP's stated minimum for installing and running QuTS hero, but that does not make every advertised ZFS feature a fit. QNAP says inline data deduplication needs at least 16 GB and recommends 32 GB for optimal performance. The model's hardware maximum is 16 GB, so the recommendation cannot be reached on this chassis. If those features matter, compare the actual memory policy and intended workload against QNAP's current requirements rather than treating “supports QuTS hero” as a blanket guarantee. The two SODIMM slots and 16 GB ceiling are listed, but exact replacement modules should still be confirmed before purchase.

QNAP lists RAID 1 under both operating-system profiles. A buyer can supply two compatible disks and create a mirror, leaving two bays for a later expansion path; the unit does not arrive with that array. RAID 1 can preserve access through a single drive failure, but it does not replace a separate copy against deletion, malware, theft or failure of the whole NAS. Make a backup plan before filling the trays.

Two 2.5GbE ports are not one 5GbE port

The chassis has two built-in 2.5GbE RJ45 ports. QNAP describes up to 5 Gbps combined bandwidth through port trunking, which is a multi-link configuration, not a single 5-Gbps client interface and not a tested file-transfer result. The switch or router, client network adapter, cabling, storage pool and workload all matter. If one faster port is essential, the listed PCIe slot may support an optional network card, but that requires exact card compatibility and competes with the same slot used for an M.2 adapter. QNAP's current expansion-card list repeats the QXG-10G1T label with different chipset and PCIe descriptions; confirm the precise card revision before relying on that model name. Decide whether the priority is faster networking, add-on M.2 storage or another PCIe device before planning the build.

Rack fit and package details need a second check

QNAP's current U.S. selector reports 1.7 × 16.93 × 18.86 inches (H/W/D) and 16.58 lb net. The older English-U.S. TS-x64U guide lists the TS-464U-4G at 1.70 × 19.0 × 19.05 inches and 14.55 lb. Those figures do not reconcile, and the guide covers the 4G profile rather than this 8G order code. They are not a basis for calculating cabinet fit or installed weight. Confirm the current chassis drawing, rack posts, cabinet depth, rail kit, rear cable bend and service clearance with QNAP before installation.

The manufacturer package display lists one power cord, one Ethernet cable, drive screws, two hangers and a quick-install guide; it does not list data drives or rack rails. QNAP's current TS-464U compatibility list includes RAIL-B02 under Rail Kit, and the older guide names it for the 4G profile, but a family-level accessory row does not certify exact 8G-revision fit in a particular cabinet or show that a seller includes it. This is the non-RP TS-464U with one 250-W power supply. It is not the TS-464U-RP, whose redundant supplies are a materially different hardware choice. One supply also means the rack's upstream power path needs its own protection plan.

Who should keep it on the list?

The TS-464U-8G-US deserves consideration when four internal bays, two built-in 2.5GbE ports, a 1U form factor and the option of QTS or QuTS hero are the right combination—and when one PSU is acceptable. It is a less obvious fit for buyers who require redundant power, native M.2 slots, a built-in 10GbE port or a fully provisioned QuTS hero memory configuration. The 8 GB profile is more ready for the QuTS hero minimum than its 4 GB sibling, but it still does not reach QNAP's 32 GB recommendation.

Before ordering, verify the exact -8G-US identity, the full model/capacity/interface/firmware row for each intended drive, chosen OS and RAID layout, current rail fit, rack measurements and the seller's actual contents. Ask QNAP to resolve the 2.5-inch HDD wording or conflicting WD103KRYZ entries if either is central to your plan. Neither the QNAP comparison nor its advertised networking figure establishes the performance of a particular installation.

Primary references: QNAP's U.S. TS-464U product page, hardware and software selectors, U.S. comparison, current TS-464U compatibility list, and English-U.S. TS-x64U guide. Product, selector, comparison and guide material checked 2026-11-01; compatibility list checked 2026-11-05.