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Product comparison · 2 nas & storage servers

QNAP ES1686dc R2 vs QNAP TS-H665U Storage server Rack (1U)

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  • 52specifications compared
  • 27differ
  • 25identical
  • 39known for one product only

Key differences

The QNAP ES1686dc R2 has 12 more storage drives supported than the QNAP TS-H665U Storage server Rack (1U) (16 vs 4). The QNAP ES1686dc R2 has 4 more processor cores than the QNAP TS-H665U Storage server Rack (1U) (8 vs 4). The QNAP ES1686dc R2 has 40 GB more internal memory than the QNAP TS-H665U Storage server Rack (1U) (48 GB vs 8 GB). Supported storage drive types: HDD & SSD on the QNAP ES1686dc R2, SSD on the QNAP TS-H665U Storage server Rack (1U). Supported storage drive interfaces: Serial Attached SCSI (SAS) on the QNAP ES1686dc R2, Serial ATA III, M.2 on the QNAP TS-H665U Storage server Rack (1U).

  • Number of storage drives supported
    • 16
    • 4
  • Supported storage drive types
    • HDD & SSD
    • SSD
  • Supported storage drive interfaces
    • Serial Attached SCSI (SAS)
    • Serial ATA III, M.2
  • Storage drive sizes supported
    • 2.5,3.5"
    • 3.5,E1.S,M.2
  • RAID levels
    • 0, 1, 5, 6, 10, 50, 60
    • 0, 1, 5, 6, 10, 50, JBOD
  • Processor cores
    • 8
    • 4
  • Internal memory
    • 48 GB
    • 8 GB
  • Internal memory type
    • DDR4
    • DDR5

Side by side

Differences highlightedShow differences only
91 specifications
A

QNAP

ES1686dc R2View product
B

QNAP

TS-H665U Storage server Rack (1U)

Model TS-H665U

View product
Storage5 differ
Number of storage drives supportedDiffers164
Supported storage drive typesDiffersHDD & SSDSSD
Supported storage drive interfacesDiffersSerial Attached SCSI (SAS)Serial ATA III, M.2
Storage drive sizes supportedDiffers2.5,3.5"3.5,E1.S,M.2
RAID levelsDiffers0, 1, 5, 6, 10, 50, 600, 1, 5, 6, 10, 50, JBOD
RAID rebuildKnown for oneYes
Supported file systemsKnown for oneext4, ext3, HFS+, FAT32, exFAT
Auto-rebuildKnown for oneYes
Bad block scanKnown for oneYes
Disk roamingKnown for oneYes
Processor1 differ
Processor familyKnown for oneIntel® Xeon® D
Processor modelKnown for oneD-2142IT
Processor frequencyKnown for one1.9 GHz
Processor boost frequencyKnown for one3 GHz
Processor coresDiffers84
Memory5 differ
Internal memoryDiffers48 GB8 GB
Internal memory typeDiffersDDR4DDR5
Maximum RAM supportedDiffers512 GB16 GB
ECCKnown for oneYes
Memory form factorDiffersRDIMM/LRDIMMSO-DIMM
Memory slotsDiffers81
Network1 differ
Ethernet LAN data ratesDiffers10,100,1000 Mbit/s2500,1000,100,10 Mbit/s
iSCSI supportKnown for oneYes
Supported network protocolsKnown for oneCIFS/SMB2/SMB3, NFS v3/NFS v4.1, FTP, FTPS, TFTP, HTTP, HTTPS, SSH, iSCSI, Fibre Channel, SNMP, SMTP, SMSC
DHCP serverKnown for oneYes
Wake-on-LAN readyKnown for oneYes
Ports & interfaces1 differ
Ethernet LAN (RJ-45) portsDiffers32
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one2
Fiber ports quantityKnown for one4
Fiber optic connectorKnown for oneSFP+
PCI Express x8 (Gen 3.x) slotsKnown for one2
USB portKnown for oneYes
USB 2.0 ports quantityKnown for one3
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantityKnown for one1
Design2 differ
Chassis typeDiffersRack (3U)Rack (1U)
Product colourDiffersBlack, GreyBlack
Number of fansKnown for one2 fan(s)
Fan diameterKnown for one6 cm
Fan diameter 2Known for one6 cm
Performance2 differ
TypeDiffersNASStorage server
Device classDiffersLarge Enterprise BusinessHome & Home Office
Multilingual supportKnown for oneYes
Access Control List (ACL)Known for oneYes
Hot spareKnown for oneYes
Disk scanKnown for oneYes
Software1 differ
Operating system installedDiffersQNAP QESQNAP QTS
Operating system versionKnown for one5.2.9
Power2 differ
Power supply unit (PSU) capacityDiffers700 W250 W
Redundant power supply (RPS) supportKnown for oneYes
Power consumption (typical)Known for one500.87 W
AC input voltageDiffers90-264 V100 - 240 V
Fan voltageKnown for one12 V
Weight & dimensions7 differ
WidthDiffers483.1 mm430 mm
DepthDiffers630.6 mm374.9 mm
HeightDiffers132 mm43.3 mm
Package widthDiffers587 mm550 mm
Package depthDiffers750 mm170 mm
Package heightDiffers351 mm582 mm
Package weightDiffers32.7 kg6.94 kg
Packaging contentidentical
Cables includedKnown for oneAC, LAN (RJ-45), RS-232
Power cables quantityKnown for one2
Rack mount kitKnown for oneYes
Number of screwsKnown for one64
Package typeKnown for oneBox
Operational conditionsidentical
Storage relative humidity (H-H)Known for one5 - 95%
Other featuresidentical
Warranty periodKnown for one5 year(s)

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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