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QNAP TS-H665U Specs, Pros and Cons

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The quick verdict

  • Strengthswarranty 3 yr (top 7%), CPU cores 4 (top 22%)
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Rankings and scores come from the specs alone and are not affected by affiliate commissions.

Spec ruler

Chart placing the QNAP TS-H665U on a 0 to 100 ruler for each spec within the category
Longer bars mean a better value within the category (top %). The numbers are the actual specs.

In short

Bottom line. The QNAP TS-H665U lists 4 drive bays, 4 CPU cores, base RAM 8 GB, and max RAM 16 GB in its official specs. Against 219 QNAP models, its strengths are 4 CPU cores (top 22%), base RAM 8 GB (top 23%), and volume 6.98 L (top 25%), and nothing falls in the bottom 25%.

This page lays out the QNAP TS-H665U from the 11 specs published on QNAP's official hardware specification pages. Drive bays: 4 bays (bottom 35% of 219). The TS-H665U has 4 CPU cores (top 22% of 204). Base RAM comes in at 8 GB (top 23% of 219). Max RAM: 16 GB (bottom 48% of 219). The TS-H665U's max LAN speed is 2.5 Gbps (bottom 48% of 219). LAN ports comes in at 2 ports (bottom 38% of 219). M.2 slots: 0 slots (bottom 46% of 136). The TS-H665U has 1 PCIe slots (top 49% of 146). USB ports comes in at 4 ports (top 35% of 219). Volume: 6.98 L (top 25% of 217). The TS-H665U's warranty is 3 years (top 7% of 214). Strengths (top 25% of 219 QNAP models): 4 CPU cores, top 22%; base RAM 8 GB, top 23%; volume 6.98 L, top 25%; warranty 3 years, top 7%.

Key points

CPU coresStrength

  • 4 cores
  • top 22% of 204 QNAP models

4 cores for backups and transcodes at once

Base RAMStrength

  • 8 GB
  • top 23% of 219 QNAP models

8 GB out of the box for several apps

VolumeStrength

  • 6.98 L
  • top 25% of 217 QNAP models

Key specs at a glance

Key specs at a glance
SpecTS-H665U
Warranty3 yrtop 7%
CPU cores4top 22%
Base RAM8 GBtop 23%
Volume6.98 Ltop 25%
USB ports4top 35%
PCIe slots1top 49%
Show every spec
Full specifications
SpecTS-H665U
Drive bays4bottom 35%
CPU cores4top 22%
Base RAM8 GBtop 23%
Max RAM16 GBbottom 48%
Max LAN speed2.5 Gbpsbottom 48%
LAN ports2bottom 38%
M.2 slots0bottom 46%
PCIe slots1top 49%
USB ports4top 35%
Volume6.98 Ltop 25%
Warranty3 yrtop 7%
Derived metrics
Metric (0–100)TS-H665U
Compactness percentile74.8
Small office fit64

The details

Performance and memory

  • Max RAM: 16 GB (bottom 48%)

Storage and connections

  • Drive bays: 4 bays (bottom 35%)
  • Max LAN speed: 2.5 Gbps (bottom 48%)
  • LAN ports: 2 ports (bottom 38%)

Storage and connections

  • M.2 slots: 0 slots (bottom 46%)
  • PCIe slots: 1 slot (top 49%)
  • USB ports: 4 ports (top 35%)

Size, power and warranty

  • Warranty: 3 years (top 7%)

TS-H665U vs the similar TS-464U10 match

  • Volume: 6.98 L vs 8.92 L

TS-H665U vs the similar TS-453D8 match

  • Max RAM: 16 GB vs 8 GB
  • USB ports: 4 ports vs 5 ports
  • Volume: 6.98 L vs 6.46 L

TS-H665U vs the similar TS-864EU9 match

  • Drive bays: 4 bays vs 8 bays
  • Volume: 6.98 L vs 11.4 L

Combined metrics

  • Expansion slots in total (M.2 plus PCIe): 1
  • Total built-in LAN bandwidth (sum of port speeds): 5 Gbps
  • Memory headroom (max minus base): 8 GB

Use-case scores

  • Small-office file server: 64

Variant TS-H665U-RP:

  • all 11 compared specs match the TS-H665U, so the spec figures here apply to it as well.

Not in the official specs

  • boost clock, weight, and operating power

Use-case scores are Specotomy's own index, computed by fixed rules from official manufacturer specs; they are not manufacturer scores.

FAQ

What is the max LAN speed of the QNAP TS-H665U?
2.5 Gbps.
What is the max RAM of the QNAP TS-H665U?
16 GB.
How many drive bays does the QNAP TS-H665U have?
4.
How many M.2 slots does the QNAP TS-H665U have?
0.