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QNAP · Enterprise models

QNAP ES1686dc R2

The QNAP ES1686dc R2 is a 16-bay rackmount NAS built around the Intel Xeon D-2142IT processor. Installed memory is 64 GB DDR4 ECC RDIMM per controller, expandable to 512 GB per controller. Networking is 3 x 2.5GbE, 4 x 10GbE SFP+, per controller.

Drive bays
16
Processor
Intel Xeon D-2142IT
Memory
64 GB DDR4 ECC RDIMM per controller
Network
10GbE

Who it suits

A rackmount unit suits an office with a server rack or a comms room. The redundant power supply keeps it running if one supply fails. With this many bays it is typically used as central storage or as the backup target for a whole company.

QNAP ES1686dc R2 specifications

ProcessorIntel Xeon D-2142IT, 8-core, 1.9 GHz (up to 3.0 GHz), per controller
Memory installed64 GB DDR4 ECC RDIMM per controller
Maximum memory512 GB per controller
Drive bays16 x 3.5" SAS 12Gb/s
Network ports3 x 2.5GbE, 4 x 10GbE SFP+, per controller
USB ports2 x USB 3.2 Gen 1 per controller
Expansion slots2 x PCIe Gen 3 x8 per controller
HDMInone
Form factorRackmount 3U
Size (H × W × D)132 x 446.2 x 587.75 mm
Weight30.22 kg
Power consumption500.87 W operation
Power supply700 W redundant
Warranty5 years
Versions soldES1686dc-R2-2142IT-128G (64 GB per controller), ES1686dc-R2-2142IT-96G (48 GB per controller), ES1686dc-R2-2123IT-64G (32 GB per controller)

Specifications from QNAP's published data, checked October 2026. See the ES1686dc R2 on QNAP's website. Confirm details before ordering.

Usable capacity by RAID level

How much space the ES1686dc R2 gives with typical drive sizes.

RAID level16 × 4 TB16 × 8 TB16 × 12 TB16 × 16 TB16 × 20 TB
RAID 656 TB112 TB168 TB224 TB280 TB

Space is shown before formatting; expect about 10% less in use. Larger systems are often split into more than one RAID group.

What we do with it

  • Storage

    NAS supply and installation

    A right-sized Synology, QNAP or Asustor unit with the drives, RAID level and network setup your office needs.

  • Backup

    Automatic backup setup

    Scheduled backups of PCs, servers and shared folders to the NAS, with an off-site copy, so nobody has to remember to do it.

  • Versions

    Ransomware protection for NAS

    Point-in-time snapshots and protected copies that let you roll a folder back to how it was before an attack or a mistake.

  • Move

    Data migration

    We move your files, users and permissions from old servers, external drives or an ageing NAS.

Questions about the ES1686dc R2

How much usable storage does the ES1686dc R2 give?

It depends on the drives and the RAID level. With 16 × 8 TB drives in RAID 6 you get about 112 TB before formatting. The capacity table on this page shows other combinations.

Can the memory in the ES1686dc R2 be upgraded?

Yes. It ships with 64 GB DDR4 ECC RDIMM per controller and QNAP lists a maximum of 512 GB per controller.

Does the ES1686dc R2 have 10GbE?

Yes. Its network ports are 3 x 2.5GbE, 4 x 10GbE SFP+, per controller.

What warranty does the ES1686dc R2 have?

QNAP lists a hardware warranty of 5 years for this model.

Do you supply the ES1686dc R2 with drives and installation?

Yes. We supply it with compatible drives fitted, configured and tested, and can install it at your office. Ask for a quote on this page.

Similar QNAP models

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    QNAP ES1686Adc

    Intel Xeon D-2142IT, 64 GB DDR4 ECC RDIMM per controller, 3 x 2.5GbE, 4 x 10GbE SFP+, per controller

  • 16-bay

    QNAP TS-1673AU-RP

    AMD Ryzen Embedded V1500B, 16 GB DDR4 UDIMM, 2 x 2.5GbE

  • 16-bay

    QNAP TS-h1677AXU-RP

    AMD Ryzen 7 7000 series, 32 GB DDR5 UDIMM, 2 x 2.5GbE, 2 x 10GBASE-T

  • 18-bay

    QNAP QSN-3000

    Intel Xeon E-2336, 128 GB DDR4 ECC, 2 x 2.5GbE, 2 x 10GBASE-T

16-bay alternatives from other brands

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