The Synology DS925neo+ and the DS925+ are the same NAS with a different memory stick. A line-by-line diff of the two official spec sheets returns three changed lines: the shipped memory module, the optional memory list, and one Hyper-V compatibility entry. Everything else in the Synology neo+ vs Plus comparison, from the CPU to the warranty, is identical.
The price is where the two lines split, and it splits in opposite directions depending on the country. In Japan the DS925neo+ sells for about 18% less than the DS925+. On Amazon US, the same neo+ costs $134 more, ships as an Amazon Japan import, and is listed as a preorder until October 21, 2026.
Verified October 2026 against Synology spec sheets for DSM 7.4.1, with live Amazon US and kakaku.com prices.
What the Synology neo+ series is
Synology announced the DiskStation neo+ series on August 7, 2026, with four models: DS725neo+, DS925neo+, DS1525neo+ and DS1825neo+. The press release describes them as built on the same platform as the DS Plus series, with 4GB of non-ECC DDR4 SODIMM memory as the default configuration, and states that the neo+ line will coexist with the Plus models rather than replace them. Synology framed the change around shifting memory market dynamics, which in 2026 means the DRAM shortage behind the 2026 memory price increases.
The neo+ models do not appear on the US, UK or EU Synology sites. The DS925+ product page carries the neo+ variant on the Australian, Indian, Japanese, Middle East, Africa and other Asia Pacific sites, and nowhere in North America or Europe at the time of checking, even though the press release describes availability through global distribution channels. Firmware for all four neo+ models first appears in the DSM 7.4.1 release.
Spec sheet diff: neo+ vs Plus, model by model
Each pair was compared using the official Synology product specification PDFs, all dated August 6, 2026. The memory line is the only hardware difference, but it is not the same difference across the range. The 2-bay and 4-bay pairs ship the same 4GB capacity and differ only in ECC. The 5-bay and 8-bay pairs lose ECC and half the memory.
| Pair | CPU (both) | neo+ memory | Plus memory | What neo+ gives up |
|---|---|---|---|---|
| DS725neo+ / DS725+ | AMD Ryzen R1600, 2C/4T | 4GB DDR4 non-ECC | 4GB DDR4 ECC | ECC only |
| DS925neo+ / DS925+ | AMD Ryzen V1500B, 4C/8T | 4GB DDR4 non-ECC | 4GB DDR4 ECC | ECC only |
| DS1525neo+ / DS1525+ | AMD Ryzen V1500B, 4C/8T | 4GB DDR4 non-ECC | 8GB DDR4 ECC | ECC and 4GB |
| DS1825neo+ / DS1825+ | AMD Ryzen V1500B, 4C/8T | 4GB DDR4 non-ECC | 8GB DDR4 ECC | ECC and 4GB |
Note the 2-bay pair: the DS725neo+ and DS725+ use the dual-core Ryzen R1600, not the V1500B used across the rest of the range. Both lines share the rest of the specification:
- Two SODIMM slots, socketed rather than soldered, with a 32GB (2 x 16GB) maximum.
- Two M.2 2280 NVMe slots for cache or storage pools.
- Two 2.5GbE ports on the 4, 5 and 8-bay models, and one 2.5GbE plus one 1GbE port on the 2-bay.
- A Gen3 x2 network upgrade slot on the DS1525 that takes only the Synology E10G22-T1-Mini 10GbE module, and a Gen3 x8 slot (x4 link) on the DS1825 for 10GbE or 25GbE cards.
- No integrated GPU on any model, which rules out hardware video transcoding on either line.
- The same power figures, expansion support through the DX525, and a three-year warranty.
The third changed line is minor: the DS925neo+ spec sheet lists Hyper-V support for Windows Server 2025 only, where the DS925+ sheet lists Windows Server 2025 and 2022.
Price: about 18% cheaper in Japan, more expensive in the US
The neo+ line exists to undercut the Plus models where Synology sells it through normal channels. On kakaku.com on October 4, 2026, the lowest DS925neo+ price was 118,599 yen against 144,000 yen for the DS925+, a 17.6% saving for a 4GB non-ECC module in place of a 4GB ECC one.
Amazon US tells a different story. The neo+ listings are sold by Amazon Japan, carry no buy box, and are marked as preorders. The domestic Plus models are in stock, mostly sold by Amazon.com, and cost less.
| Pair | neo+ on Amazon US | Plus on Amazon US | Difference |
|---|---|---|---|
| DS725 | $812.60, Amazon Japan preorder | $551.49, in stock | neo+ costs $261 more |
| DS925 | $906.51, Amazon Japan preorder | $772.14, in stock | neo+ costs $134 more |
| DS1525 | $1,299.33, Amazon Japan preorder | $1,309.99, third-party seller | neo+ $11 less, with half the RAM and no ECC |
| DS1825 | No US listing found | $1,544.97, in stock | No comparison possible |
Prices were pulled from the Amazon product API on October 4, 2026 and move daily, so treat the gaps as a snapshot. The pattern is the point: a US buyer pays an import premium for the cheaper configuration, which removes the only reason the neo+ line exists.
What non-ECC memory costs on a NAS
ECC memory corrects single-bit errors in RAM and detects multi-bit errors before they reach disk. Btrfs on a Synology volume always checksums metadata, and file data too when data checksum is enabled on the shared folder, which catches corruption on read and can repair it on a redundant RAID. Neither can help if a bit flips in memory before the block is checksummed and written, because the checksum is then computed over already-damaged data. For a NAS that runs for years and handles every write in the house or office, that is the risk ECC reduces. The Synology DS224+ and DS423+ shipped with non-ECC memory, so non-ECC is not unusual in this class, but the failure mode is silent when it does happen.
The larger cost is the upgrade path. The Synology spec sheets require that all modules in a multi-module configuration be identical and share the same model number, and the neo+ press release adds that mixing ECC and non-ECC modules is not officially supported. On a neo+, that leaves two supported routes:
- Stay non-ECC: add a second, identical Synology D4NS01-4G for 8GB total. Synology lists no larger non-ECC module for the neo+ models, so 8GB is the ceiling on this route.
- Move to ECC: remove the shipped 4GB non-ECC stick and install Synology ECC modules (D4ES04-4G, D4ES03-8G or D4ES03-16G). The original module becomes a spare part.
The second route is where US pricing hurts. On October 4, 2026, the Synology 4GB ECC module was out of stock on Amazon US, no first-party 8GB ECC listing was found, and the 16GB D4ES03-16G was listed at $1,149.27. Third-party ECC modules cost a fraction of that, for example OWC 8GB ECC at $74.99 or OWC 16GB ECC at $157.26, but Synology does not provide full warranty or technical support when non-Synology memory is installed.
NAS Compares found that third-party modules still worked on a DS923+ after the DSM 7.2 update, with DSM flagging them as unsupported. That behavior has not been confirmed on the 2025 models, on DSM 7.4.1, or on a neo+ unit. Two memory-gated limits apply to both lines: volumes larger than 108TB require 32GB of RAM, and the spec sheets list 8GB as the minimum for AI Console data de-identification.
Which Synology Plus model to buy in the US
For a US buyer the decision is between Plus models, because the neo+ costs more and arrives later. Pick by bay count, then plan the RAM upgrade around what the box will run.
DS925+: the default 4-bay choice
Four bays, the quad-core V1500B and 4GB of ECC memory make the DS925+ the model most buyers in this range should start with. At $772.14 it sat $134 below the imported DS925neo+ on October 4, with a $889.99 list price and more than 150 Amazon ratings. Before running containers or virtual machines, plan a memory upgrade: the identical-module rule means a second D4ES04-4G, which was out of stock on Amazon US, or replacing the shipped stick with a matched pair of larger ECC modules.
DS725+: two bays, lower power draw
The DS725+ suits a mirrored pair for backups and file sharing. Its dual-core R1600 is the weaker CPU in the range, and its second network port is 1GbE rather than 2.5GbE. The gap to the neo+ version is the widest of any pair, with the DS725+ at $551.49 against $812.60 for the imported DS725neo+, although stock was down to a few units.
DS1825+: eight bays and 8GB ECC
The 8-bay model ships with 8GB of ECC memory and a PCIe 3.0 slot that takes 10GbE or 25GbE cards. No neo+ version was listed on Amazon US, and outside the US the neo+ variant would cut it to 4GB non-ECC, which is a poor trade on a unit sized for multi-user storage. Listed at $1,544.97 and sold by Amazon.com.
DS1525+: five bays, check the seller
The DS1525+ is the one pair where the neo+ was cheaper on paper, by $11, in exchange for half the memory and no ECC. That is not a saving. The catch on the Plus side is the seller: at $1,309.99 the listing was sold by a third-party merchant rather than Amazon.com, so confirm the seller and the warranty terms before ordering.
Drive choice matters as much as the chassis. Read the CMR vs SMR breakdown before buying disks, and see the UPS guide for a NAS for clean shutdowns. Under the DSM 7.3 drive policy for 2025 and later Plus models, which covers these four and their neo+ variants, unlisted third-party hard drives and 2.5-inch SATA SSDs can be used for new storage pools, while M.2 NVMe drives used for pools or cache still need to be on the Synology compatibility list.
Verdict by market and bay count
| Buyer | Buy | Reason |
|---|---|---|
| US, any bay count | The Plus model | neo+ is an Amazon Japan import that costs more or saves nothing |
| Japan, Australia, India, Asia Pacific, Middle East, Africa, 2 or 4 bays | neo+ if the box stays at 4 to 8GB non-ECC | Cheaper for the same hardware, 17.6% for the DS925 pair in Japan |
| Outside the US, 5 or 8 bays | The Plus model | neo+ drops to 4GB non-ECC from 8GB ECC |
| Anyone planning containers, VMs or a move to ECC later | The Plus model | ECC upgrades on neo+ mean replacing the shipped module, not adding to it |
The neo+ line makes sense in its home markets for a file and backup box that will never see a memory upgrade. Everywhere else, and especially in the US, the Plus model is the cheaper and safer purchase. Buyers still weighing Synology against a self-built box can compare the numbers in the DIY NAS vs prebuilt breakdown, and office buyers can see where these models rank in the small business NAS guide.
