Asustor
Asustor Flashstor 12 Pro Gen2
All-flash · 12× M.2 NVMe · 10 GbE
89
/ 100
From $1,599
VS
Asustor Flashstor 12 Pro Gen2 wins by 1
Synology
Synology DS1522+
NAS · $699
88
/ 100
From $699
Specdex verdict
Asustor Flashstor 12 Pro Gen2 takes it — here’s why.
In our weighted Specdex score, Asustor Flashstor 12 Pro Gen2 lands at 89 and Synology DS1522+ at 88. That puts Asustor Flashstor 12 Pro Gen2 ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Asustor Flashstor 12 Pro Gen2 if…
- ✓12× M.2 NVMe slots
- ✓10 GbE built-in
- ✓Silent — no spinning drives
Pick Synology DS1522+ if…
- ✓Rich software ecosystem (Synology/QNAP)
- ✓NVMe cache slots on newer models
- ✓Docker/VM support on higher tiers
Asustor Flashstor 12 Pro Gen2 89
vs 88 Synology DS1522+
Score breakdown
Asustor Flashstor 12 Pro Gen2
89 hardware 96
software 80
value 86
ease 84
performance 0
features 0
Synology DS1522+
88 hardware 0
software 86
value 82
ease 0
performance 88
features 88
Specs side-by-side
| Spec | Asustor Flashstor 12 Pro Gen2 | Synology DS1522+ |
|---|---|---|
| CPU | Intel Atom x7835RE (8 cores) | — |
| RAM | 16 GB DDR5 (expandable to 64) | — |
| Bays | 12× M.2 NVMe Gen 4 | — |
| Network | 10 GbE × 1 + 2.5 GbE × 2 | — |
| USB | 4× USB 3.2 Gen 2 | — |
Asustor Flashstor 12 Pro Gen2
Pros
- +12× M.2 NVMe slots
- +10 GbE built-in
- +Silent — no spinning drives
Cons
- −NVMe TB-per-dollar still pricey
- −Heat management critical
- −ADM software trails DSM polish
Synology DS1522+
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: Asustor Flashstor 12 Pro Gen2 vs Synology DS1522+
Which is better, Asustor Flashstor 12 Pro Gen2 or Synology DS1522+? +
Asustor Flashstor 12 Pro Gen2 scores 89 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.
Is Asustor Flashstor 12 Pro Gen2 worth the price? +
At $1,599, Asustor Flashstor 12 Pro Gen2 delivers a Specdex score of 89 — strongest in hardware.
Is Synology DS1522+ worth the price? +
At $699, Synology DS1522+ delivers a Specdex score of 88 — strongest in performance.
Does Asustor Flashstor 12 Pro Gen2 or Synology DS1522+ 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.