Asustor NAS RAM & SSD Upgrade Guide (2026)
Asustor NAS systems offer excellent value and upgradeability, particularly in the compact 2- and 4-bay segment. Most Asustor models feature accessible RAM slots and NVMe cache support, making them easy to expand for better performance.
This guide covers RAM and SSD compatibility for Asustor’s popular consumer and small business models.
Asustor NAS Compatibility Matrix
| Model | Default RAM | Max RAM | RAM Slots | NVMe Slots | Total Bays |
|---|---|---|---|---|---|
| AS6704T | 2GB | 8GB | 1 | 2 | 4 |
| AS3304T | 2GB | 8GB | 1 | 2 | 4 |
| FS6706T | 4GB | 16GB | 2 | 2 | 6 |
| AS6702T | 2GB | 8GB | 1 | 0 | 2 |
| AS5404T | 4GB | 32GB | 2 | 2 | 4 |
RAM Compatibility
Asustor units use DDR4 SO-DIMM memory. Most models support both 2666 MHz and 3200 MHz speeds. Budget-friendly units like the AS6702T have limited upgradeability (1 slot, 8GB max), while the AS5404T supports 32GB total — making it excellent for Plex or Docker workloads.
Recommended brands: Kingston, Crucial, Samsung, Corsair.
NVMe SSD Cache
Asustor’s cache system works well for Plex, Docker, and general performance boost. Most models support 2 NVMe M.2 slots. Cache recommendations mirror Synology and QNAP — WD Red SN700, Seagate IronWolf 525, or Samsung 980 Pro.
Model-Specific Guides
- Asustor AS6704T Upgrade Guide
- Asustor AS3304T Upgrade Guide
- Asustor FS6706T Upgrade Guide
- Asustor AS6702T Upgrade Guide
- Asustor AS5404T Upgrade Guide
Common Asustor Questions
What’s the difference between Asustor AS and FS series?
AS models are general-purpose NAS units for SMB and home use. FS models are filesystem-focused units with higher performance and storage capacity, designed for small business environments.
Can I upgrade RAM in Asustor?
Yes. Asustor units have accessible SO-DIMM slots. Open the chassis, locate the RAM slot, and insert DDR4 SO-DIMM memory. Maximum capacity varies by model (8GB–32GB).
How much RAM do I need for Asustor?
Basic use: 2–4GB. Plex or Docker: 8–16GB. High-performance workloads: 16–32GB. The AS5404T is the only Asustor model supporting 32GB.
Is Asustor cheaper than Synology or QNAP?
Asustor is often 10–20% cheaper than comparable Synology or QNAP models. However, software ecosystem and support are narrower. Choose Asustor for budget-conscious setups; Synology for broad ecosystem support.
Does Asustor support SSD caching?
Yes. Most models have 2 NVMe M.2 slots for read-only or read-write cache. SSD caching boosts Plex and Docker performance significantly.
Recommended Products
| Product | Capacity | Link |
|---|---|---|
| Kingston ValueRAM DDR4 SO-DIMM | 4GB, 8GB | View on Amazon |
| Crucial DDR4 SO-DIMM | 4GB, 8GB, 16GB, 32GB | View on Amazon |
| WD Red SN700 NVMe | 500GB, 1TB, 2TB | View on Amazon |
| Seagate IronWolf 525 | 500GB, 1TB, 2TB | View on Amazon |
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