Adding RAM to a NAS is the highest-value upgrade after adding drives.
Doubling or tripling NAS RAM improves ZFS caching, VM performance, and container density. This guide covers the compatible RAM kits for the most popular NAS platforms – Synology, QNAP, TrueNAS, and UGREEN.
In this guide (jump ahead)
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The categories in this guide
- Synology DDR4 SODIMM — For DS920+, DS220+, DS224+, DS923+.
- Synology DDR5 SODIMM — For newer 2024+ Synology models.
- QNAP compatible DDR4 SODIMM — For QNAP TS-464, TS-873A, and similar.
- TrueNAS DDR4 ECC UDIMM — For TrueNAS Mini appliances requiring ECC.
- UGREEN DDR5 SODIMM — For UGREEN NASync DXP series with DDR5.
Fastest way to pick
- Best Synology DDR4 upgrade: Crucial 16GB DDR4 SODIMM. Standard compatible upgrade for DS920+/DS224+/DS923+ (verify model support).
- Best QNAP DDR4 upgrade: Kingston 16GB DDR4 SODIMM. QNAP-compatible SODIMM upgrade.
- Best UGREEN DDR5 upgrade: Crucial 32GB DDR5 SODIMM. DDR5 SODIMM for UGREEN NASync DXP series.
- Best TrueNAS ECC upgrade: Kingston 16GB DDR4 ECC UDIMM. ECC UDIMM for TrueNAS Mini.
Synology DDR4 SODIMM upgrades
DS920+, DS220+, DS224+, DS923+ take DDR4 SODIMM. Always verify Synology compatibility page for your exact model.
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- Crucial 16GB DDR4 SODIMM 2666 — Widely-compatible 16GB DDR4 SODIMM.
- Kingston 16GB DDR4 SODIMM 2666 — Kingston alternative.
- Corsair Vengeance 32GB (2x16GB) DDR4 SODIMM — 32GB kit for max-RAM builds.
Synology DDR5 SODIMM (newer models)
2024+ Synology models use DDR5 SODIMM.
- Crucial 16GB DDR5 SODIMM 4800 — 16GB DDR5 SODIMM.
- Kingston 32GB DDR5 SODIMM 4800 — 32GB DDR5 SODIMM.
QNAP compatible DDR4 SODIMM
QNAP TS-464, TS-873A, and similar take DDR4 SODIMM. QNAP branded RAM is available; third-party often works but verify compatibility.
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- Kingston 16GB DDR4 SODIMM 2666 — QNAP-friendly DDR4 SODIMM.
- QNAP RAM-32GDR4T0-SO-2666 32GB — QNAP-branded 32GB module.
TrueNAS DDR4 ECC UDIMM (Mini X/X+)
TrueNAS Mini appliances use ECC UDIMM. Server-grade RAM only.
- Kingston 16GB DDR4 ECC UDIMM 2666 — ECC UDIMM for TrueNAS Mini X.
- Micron 32GB DDR4 ECC UDIMM — 32GB ECC for Mini X+.
UGREEN NASync DDR5 SODIMM
UGREEN NASync uses DDR5 SODIMM. Verify model max RAM supported.
- Crucial 32GB DDR5 SODIMM 4800 — DDR5 SODIMM upgrade for NASync.
- Kingston Fury Impact 16GB DDR5 SODIMM — Kingston DDR5 alternative.
Final note
All products listed are widely-supported and have active owner communities. Check Amazon for current pricing and reviews.
Related HomeNode guides
- Best 8-Bay NAS 2026: Synology DS1823+ vs QNAP TS-873A vs TrueNAS Mini X+ Compared
- Best 2-Bay NAS 2026: Synology DS224+ vs QNAP TS-233 vs UGREEN NASync DXP2800
- Best 4-Bay NAS Enclosure 2026: Synology DS923+, QNAP TS-464, UGREEN DXP4800, and Terramaster F4-424 Ranked
- Best 4-Bay NAS Under $300 in 2026: UGREEN, Terramaster, and Asustor Picks
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Frequently asked questions
How were these products selected?
This guide is a research-based synthesis of product specs, brand reputation, current Amazon reviews, and category trends. It is not a hands-on review – use it to narrow options before you buy.
What price range should I expect?
Prices vary significantly across the categories above. Entry options start at the lower end of each tier listed, while premium picks can be several times more. Amazon pricing changes frequently, so confirm current numbers on the product listings.
Should I always buy the most expensive option?
Not necessarily. Premium products offer better materials, longer warranties, and higher-end features, but mid-tier picks meet the needs of most buyers. Match the pick to your actual use case rather than defaulting to the top of the price range.
How often is this guide updated?
This guide is refreshed as new products launch and older picks are discontinued. Amazon pricing and stock change daily – always confirm current price and availability on Amazon before purchase.
Where is the best place to buy?
Amazon is linked throughout this guide because it typically has broad selection, current pricing, and standardized return policies. Direct manufacturer sites and specialty retailers are also options depending on category and preference.