QNAP TS-1635AX

← Back to the full QNAP NAS list

Status: Legacy / discontinued

A 16-bay desktop NAS with twelve 3.5-inch bays and four 2.5-inch bays for SSD caching. Two 10GbE SFP+ ports (fiber or direct-attach cable) next to two gigabit ports give it fast networking out of the box. The ARM processor limits some apps, and the M.2 slots take SATA SSDs only, not NVMe.

Bays	12
CPU	Marvell Armada 8040
Cores / Threads	4 / 4
RAM	4 GB or 8 GB installed (varies by SKU)
Product category	-
Badge	-
Hardware support status	Discontinued
OS/app support	Full
Technical support end	Active
Recommended replacement	-
Release year	2018
RAID levels	JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60
PCIe slot types	2x PCIe Gen 3
RAM (max)	16 GB
Memory slots	1
Memory generation	DDR4
Memory speed (MT/s)	2400 MT/s
ECC memory	Non-ECC
Memory module type	UDIMM
Replaceable memory	Replaceable
Network ports	2x 10GbE
USB ports	3x USB 3.2 Gen 1
PCIe expansion	2; Slot 1: PCIe Gen 3 x2; Slot 2: PCIe Gen 3 x1
M.2 slots	2
Drive bay types	3.5-inch bays:; 3.5-inch SATA hard disk drives; 2.5-inch SATA solid state drives; ; 2.5-inch bays:; 2.5-inch SATA solid state drives
Hot-swappable bays	Yes
CPU frequency (GHz)	1.6
Power draw, active (W)	76.69
Power draw, hibernation (W)	39.74
Power supply (W)	250
Dimensions H x W x D	12 x 14.6 x 12.6 in (304 x 370 x 320 mm)
Weight	26.6 lb (12.06 kg)
Largest certified configuration observed	264 TB (12 x Western Digital WD221KFGX-68B9KN0, largest drive on the vendor HCL today; not a hardware limit)
Estimated cost to fill every bay with a certified 8 TB drive	about $3,660 new (Seagate ST8000NM0055) / about $3,300 refurbished (Toshiba MG05ACA800E) / about $2,127 used (Western Digital WD81PURZ) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified
Estimated cost to fill every bay with a certified 16 TB drive	about $5,700 new (Seagate ST16000NM001G) / about $7,188 refurbished (Toshiba MG08ACA16TE) / about $4,200 used (Toshiba MG08ACA16TE) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified

View on Amazon Search eBay (used from $608.39) + Compare

3 eBay listings checked Nov 8, 2026 · 0 new, 3 used

Documents

• Product User Guide (PDF)

Compatible Drives

539 drives certified on TS-1635AX's official manufacturer compatibility list, sourced directly from QNAP's own published Hardware Compatibility List. Each model links to that drive's own compatibility page.

Certified list last checked 2026-09-16.

Compatible Memory

3 memory modules listed by QNAP as compatible with TS-1635AX. Third-party modules may also work, but are not shown here unless QNAP itself lists them as compatible.

Certified list last checked 2026-09-09. Coverage varies by model. Rated module speed is not a guarantee of NAS operating speed; follow the NAS maximum capacity and installation rules.

Looking for cameras compatible with QNAP NAS units? See the full QNAP camera compatibility database.