QNAP ES1686dc R2

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Status: Currently sold

Bays	16
CPU	Intel Xeon D-2123IT / Intel Xeon D-2142IT
Cores / Threads	4 / 8 / -
RAM	32 GB or 48 GB or 64 GB installed (varies by SKU)
Product category	Enterprise Storage
Badge	-
Hardware support status	Full
OS/app support	Full
Technical support end	Active
Recommended replacement	-
RAM (max)	1024 GB
Memory slots	16
Memory generation	DDR4
ECC memory	Supported
Memory module type	RDIMM
Replaceable memory	Replaceable
Network ports	3x 2.5GbE + 4x 10GbE
USB ports	2x USB 3.2 Gen 1
PCIe expansion	2 per controller; Slot 1: PCIe Gen 3 x8 (CPU); Slot 2: PCIe Gen 3 x8 (CPU)
Drive bay types	3.5-inch bays:; 3.5-inch SAS hard disk drives; 2.5-inch SAS hard disk drives; 2.5-inch SAS solid state drives
CPU frequency (GHz)	1.90 / 2.20
Power draw, active (W)	500.87
Power supply (W)	90
Dimensions H x W x D (mm)	132 x 446 x 588
Weight (kg)	30.22
Largest certified configuration observed	491.52 TB (16 x Samsung MZILT30THALA, largest drive on the vendor HCL today; not a hardware limit)
Estimated cost to fill every bay with a certified 8 TB drive	about $5,664 new (Toshiba MG08SDA800E) / about $12,074 refurbished (Seagate ST8000NM018B) / about $3,680 used (Seagate ST8000NM024B) -- 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 $8,560 new (Toshiba HDEPY11GEA51) / about $13,892 refurbished (Toshiba MG09SCA16TE) / about $6,048 used (Seagate ST16000NM007H) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified

• 16-bay NAS, supports SAS 12Gb/s HDD & SSD
• Intel® Xeon® D Processor, up to 3.0 GHz
• 4x 10GbE, 2x PCIe Gen 3 slots

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Compatible Drives

201 drives certified on ES1686dc R2'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

8 memory modules listed by QNAP as compatible with ES1686dc R2. 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.