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Synology DS423+ — NAS · $499
Synology

Synology DS423+

NAS · $499

86
/ 100
From $499
VS
Synology DS423+ wins by 1
Asustor AS6704T — NAS · $699
Asustor

Asustor AS6704T

NAS · $699

85
/ 100
From $699
Specdex verdict

Synology DS423+ takes it — here’s why.

In our weighted Specdex score, Synology DS423+ lands at 86 and Asustor AS6704T at 85. That puts Synology DS423+ ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Synology DS423+ if…

  • ✓Rich software ecosystem (Synology/QNAP)
  • ✓NVMe cache slots on newer models
  • ✓Docker/VM support on higher tiers

Pick Asustor AS6704T if…

  • ✓Rich software ecosystem (Synology/QNAP)
  • ✓NVMe cache slots on newer models
  • ✓Docker/VM support on higher tiers
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Performance

Tie

Compared on the performance sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Features

Tie

Compared on the features sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Software

Tie

Compared on the software sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Synology DS423+

Specdex score per dollar at MSRP

Synology DS423+ more score per dollar ($499 vs $699).

Synology DS423+ 86
vs
85 Asustor AS6704T

Score breakdown

Synology DS423+
86
performance 86
features 86
software 84
value 82
Asustor AS6704T
85
performance 85
features 85
software 83
value 82

Specs side-by-side

Synology DS423+ versus Asustor AS6704T — full spec comparison
Spec Synology DS423+ Asustor AS6704T

Synology DS423+

Pros
  • +Rich software ecosystem (Synology/QNAP)
  • +NVMe cache slots on newer models
  • +Docker/VM support on higher tiers
Cons
  • −Disks rarely included
  • −Drive compatibility restrictions on some brands
  • −Power draw 24/7

Asustor AS6704T

Pros
  • +Rich software ecosystem (Synology/QNAP)
  • +NVMe cache slots on newer models
  • +Docker/VM support on higher tiers
Cons
  • −Disks rarely included
  • −Drive compatibility restrictions on some brands
  • −Power draw 24/7

FAQ: Synology DS423+ vs Asustor AS6704T

Which is better, Synology DS423+ or Asustor AS6704T? +

Synology DS423+ scores 86 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.

Is Synology DS423+ worth the price? +

At $499, Synology DS423+ delivers a Specdex score of 86 — strongest in performance.

Is Asustor AS6704T worth the price? +

At $699, Asustor AS6704T delivers a Specdex score of 85 — strongest in performance.

Does Synology DS423+ or Asustor AS6704T last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is the better value, Synology DS423+ or Asustor AS6704T? +

Synology DS423+ — more score per dollar ($499 vs $699). Specdex score per dollar at MSRP.