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QNAP TS-351 vs QNAP TS-451D2

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The quick verdict

TS-3512 ahead
TS-451D24 ahead
  • Leads on more specsQNAP TS-451D24 of 6 differing specs (drive bays 4, boost clock 2.9 GHz)
TS-351Check Latest Price on Amazon#adBrowse on AliExpress#ad
TS-451D2Check Latest Price on Amazon#adBrowse on AliExpress#ad

Rankings and scores come from the specs alone and are not affected by affiliate commissions.

Spec ruler

Chart placing the QNAP TS-351 and the QNAP TS-451D2 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. Of the 6 specs that differ, the QNAP TS-351 leads on 2 (weight and volume) and the QNAP TS-451D2 on 4 (drive bays, boost clock, LAN ports, and 1 more). On our small-office file server index, the TS-451D2 scores 40/100 against 33/100.

Using the 11 specs published on QNAP's official hardware specification pages, here is how the QNAP TS-351 and QNAP TS-451D2 compare. Drive bays: the TS-451D2 at 4 bays versus 3 bays for the TS-351, 1 bay more (1.3x). Among 219 QNAP models, the TS-451D2 ranks in the bottom 35% and the TS-351 in the bottom 12%. The TS-451D2 leads on boost clock, 2.9 GHz to 2.58 GHz. Among 201 QNAP models, the TS-451D2 ranks in the top 39% and the TS-351 in the bottom 46%. On LAN ports, the TS-451D2 posts 2 ports and the TS-351 1 port, a gap of 1 port. Among 219 QNAP models, the TS-451D2 ranks in the bottom 38% and the TS-351 in the bottom 8%. USB ports: the TS-451D2 at 4 ports versus 3 ports for the TS-351, 1 port more (1.3x). Among 219 QNAP models, the TS-451D2 ranks in the top 35% and the TS-351 in the bottom 27%.

Key differences 3

LAN portsTS-451D2 leads

  • TS-451D2 2 ports vs the TS-351 at 1 port
  • the TS-451D2 has 2.0x the LAN ports
  • among 219 QNAP models: TS-451D2 in the bottom 38%, TS-351 in the bottom 8%

2 ports for link bonding or separate networks

Drive baysTS-451D2 leads

  • TS-451D2 4 bays vs the TS-351 at 3 bays
  • the TS-451D2 has 1.3x the drive bays
  • among 219 QNAP models: TS-451D2 in the bottom 35%, TS-351 in the bottom 12%

With 8 TB drives: 32 TB vs 24 TB raw

USB portsTS-451D2 leads

  • TS-451D2 4 ports vs the TS-351 at 3 ports
  • the TS-451D2 has 1.3x the USB ports
  • among 219 QNAP models: TS-451D2 in the top 35%, TS-351 in the bottom 27%

1 more USB for drives or a UPS

Key specs at a glance

Key specs at a glance
SpecTS-351TS-451D2
LAN ports1bottom 8%2WINbottom 38%
Drive bays3bottom 12%4WINbottom 35%
USB ports3bottom 27%4WINtop 35%
Weight1.64 kgWINtop 8%2.09 kgtop 14%
Boost clock2.58 GHzbottom 46%2.9 GHzWINtop 39%
Volume5.54 LWINtop 15%5.8 Ltop 17%
Show every spec
Full specifications
SpecTS-351TS-451D2
Drive bays3bottom 12%4WINbottom 35%
CPU cores2bottom 9%2bottom 9%
Boost clock2.58 GHzbottom 46%2.9 GHzWINtop 39%
Base RAM4 GBbottom 47%4 GBbottom 47%
Max RAM8 GBbottom 25%8 GBbottom 25%
Max LAN speed1 Gbpsbottom 22%1 Gbpsbottom 22%
LAN ports1bottom 8%2WINbottom 38%
M.2 slots2top 4%–
USB ports3bottom 27%4WINtop 35%
Weight1.64 kgWINtop 8%2.09 kgtop 14%
Volume5.54 LWINtop 15%5.8 Ltop 17%
Operating power26.2 Wtop 15%–
Warranty2 yrbottom 35%2 yrbottom 35%
Derived metrics
Metric (0–100)TS-351TS-451D2
Performance percentile8.3WIN6.8
Lightness percentile92.4WIN86.3
Compactness percentile85.2WIN83.8
Home media server fit84No data
Small office fit3340WIN
10GbE video editing fit18WIN1
Low-power compact 24/7 fit68No data

The details

How to choose

  • Weight matters most → the TS-351 (1.64 kg vs 2.09 kg)
  • LAN ports matters most → the TS-451D2 (2 ports vs 1 port)

More TS-351 leads

  • Weight: 1.64 kg vs 2.09 kg
  • Volume: 5.54 L vs 5.8 L

More TS-451D2 leads

  • Boost clock: 2.9 GHz vs 2.58 GHz

Combined metrics

  • Total built-in LAN bandwidth (sum of port speeds): TS-451D2 2 Gbps vs 1 Gbps
  • Weight per bay: TS-451D2 0.52 kg vs 0.55 kg
  • Memory headroom (max minus base): 4 GB on both

Same on both

  • CPU cores 2, base RAM 4 GB, max RAM 8 GB
  • max LAN speed 1 Gbps, warranty 2 years

Use-case scores

  • Small-office file server: TS-451D2 40 vs 33
  • 10GbE video editing: TS-351 18 vs 1

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

FAQ

Which has more drive bays, the QNAP TS-351 or the QNAP TS-451D2?
The TS-451D2, with 4 bays against 3 bays for the TS-351.
Which is lighter, the QNAP TS-351 or the QNAP TS-451D2?
The TS-351, with 1.64 kg against 2.09 kg for the TS-451D2.