QNAP TS-431X

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Status: Legacy / discontinued

A budget 4-bay business desktop NAS with a built-in 10GbE SFP+ port, so file transfers run much faster than on gigabit-only boxes. The catch is the dual-core ARM chip and 8 GB RAM ceiling, so it's better for file serving than heavy apps.

Bays	4
CPU	Annapurna Labs Alpine AL-212
Cores / Threads	2 / 2
RAM	2 GB or 8 GB installed (varies by SKU)
Product category	-
Badge	-
Hardware support status	Discontinued
OS/app support	QTS 5.2
Technical support end	2024-12-31
Recommended replacement	TS-431KX
Release year	2017
RAID levels	Single, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
RAM (max)	8 GB
Memory slots	1
Memory generation	DDR3
Memory speed (MT/s)	1600 MT/s
ECC memory	Non-ECC
Memory module type	SODIMM
Network ports	1x 10GbE + 2x 1GbE
USB ports	3x USB 3.2 Gen 1
PCIe expansion	None
M.2 slots	None
Drive bay types	3.5" SATA HDD, 3.5" SATA SSD, 2.5" SATA HDD, 2.5" SATA SSD
Hot-swappable bays	Yes
CPU frequency (GHz)	1.7
Power supply (W)	90
Dimensions H x W x D	6.7 x 6.3 x 8.6 in (169 x 160 x 219 mm)
Largest certified configuration observed	72 TB (4 x Seagate ST18000NT001-3LU101, largest drive on the vendor HCL today; not a hardware limit)
Estimated cost to fill every bay with a certified 8 TB drive	about $1,220 new (Seagate ST8000NM0055) / about $1,100 refurbished (Toshiba MG05ACA800E) / about $709 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 $1,900 new (Seagate ST16000NM001G) / about $2,396 refurbished (Toshiba MG08ACA16TE) / about $1,400 used (Toshiba MG08ACA16TE) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified

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Documents

• Product User Guide (PDF)
• hardware_datasheet

Compatible Drives

527 drives certified on TS-431X'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.

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