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Synology DiskStation DS925+ vs QNAP TS-233 2-Bay NAS

The Synology DS925+ is the stronger NAS: an x86 Ryzen V1500B, ECC memory, 2.5GbE networking, four bays and two NVMe slots make it a real multi-user and virtualization box. The QNAP TS-233 is a small ARM two-bay unit with 2GB RAM and one Gigabit port, fine for backups and file sharing for one or two people. Owners of x86 Synology units praise DSM and long software support; TS-233 buyers like the low power draw and simple setup but note the slow CPU and RAM ceiling.

  • Choose the Synology DS925+ if you want four bays, 2.5GbE, NVMe cache and room to grow to nine drives.
  • Choose the QNAP TS-233 if you need a quiet, low-power two-bay box for backups and basic file sharing.

Prices

  • Synology DiskStation DS925+: $775.00 at eBay (last seen Nov 8)
  • QNAP TS-233 2-Bay NAS: $239.00 at Amazon (last seen Nov 2)
  • Difference: the QNAP TS-233 2-Bay NAS is $536.00 cheaper than the Synology DiskStation DS925+ at the latest prices (Nov 2 and Nov 8)
Synology
Synology 4-bay DiskStation DS925+

Synology DiskStation DS925+

Synology 4-bay DiskStation DS925+

3.5(4 ratings)
$775.00at eBayObserved Nov 8, 2026, 5:05 PM
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Pros
  • x86 CPU with 8 threads handles Plex transcoding, VMs and many users
  • ECC memory up to 32 GB protects data integrity
  • 2.5GbE and dual NVMe slots remove storage bottlenecks
  • Four bays with RAID 5/6 and expansion to nine drives
  • Mature DSM software with broad app support
Cons
  • Needs drives bought separately
  • Larger and louder than a 2-bay unit
  • ECC SODIMM and NVMe add cost to reach its potential
QNAP
QNAP TS-233

QNAP TS-233 2-Bay NAS

QNAP TS-233

$239.00at AmazonObserved Nov 2, 2026, 8:03 AM
See all prices and details
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Pros
  • Small, quiet and low power
  • Simple QTS 5 setup for backups and file sharing
  • Two USB 3.1 ports for external drives
  • Comes in bundles with drives installed
Cons
  • 2 GB RAM cannot be upgraded
  • Single Gigabit port caps throughput
  • ARM CPU struggles with transcoding and containers
  • Two bays limit RAID options and capacity

What separates them

Synology DiskStation DS925+QNAP TS-233 2-Bay NAS
CPUAMD Ryzen V1500B, 4 cores/8 threads at 2.2 GHzARM Cortex-A55, 4 cores at 2.0 GHz
Memory4 GB DDR4 ECC, expandable to 32 GB2 GB DDR4, not expandable
Drive bays4 bays, expandable to 9 with a DX5252 bays, no expansion
NetworkTwo 2.5GbE portsOne Gigabit port
NVMe cacheTwo M.2 2280 slotsNone
RAID levelsRAID 0/1/5/6/10 and JBODRAID 0 and RAID 1 only
USBUSB 3.2 Gen 1One USB 3.1 Gen 1 plus two USB 2.0
Footprint and powerLarger 4-bay chassis, higher drawCompact 2-bay chassis, low draw

Price history

  • Synology DiskStation DS925+: lowest $819.99 on Nov 8 at Amazon.
  • QNAP TS-233 2-Bay NAS: lowest $239.00 on Nov 2 at Amazon.

Prices at every store

Synology DiskStation DS925+

  • eBayNew

    In stockSold by crowdedfavorite (97.9% positive, 96 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $775.00Free shippingObserved Nov 8, 2026, 5:05 PM
    Visit eBay
  • WalmartNew

    In stockSold by CR20 Electronics IncReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $819.99Free shippingObserved Nov 8, 2026, 5:05 PM
    Visit Walmart
  • Micro CenterNew

    In stock

    $829.99+ $12.99 shippingObserved Nov 8, 2026, 5:06 PM
    Visit Micro Center
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $819.99Free shippingObserved Nov 8, 2026, 5:05 PM
    Visit Amazon

Also available at

  • eBayCheck price at eBay
  • WalmartCheck price at Walmart

Store links may earn us a commission.

All 12 stores and price history →

QNAP TS-233 2-Bay NAS

  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $239.00Observed Nov 2, 2026, 8:03 AM
    Visit Amazon
  • 友和 YohoNew

    Availability unknown

    $242.04Observed Nov 2, 2026, 8:03 AM
    Visit 友和 Yoho
  • NAS HeadquartersNew

    Availability unknown

    $2,518.00Observed Nov 2, 2026, 8:03 AM
    Visit NAS Headquarters
All 3 stores and price history →

Specs compared

SpecSynology DiskStation DS925+QNAP TS-233 2-Bay NAS
colorMulticolor—
CPU modelAMD Ryzen V1500B—
CPU cores4—
CPU threads8—
CPU frequency2.2 GHz—
System memory4 GB DDR4 ECC SODIMM—
Maximum memory32 GB (16 GB × 2)—
Drive bays4 × 3.5" SATA HDD or 2.5" SATA SSD—
M.2 slots2 × M.2 2280 NVMe SSD—
Max bays with expansion9 (DX525 × 1)—
Network ports2.5GbE RJ-45 Ports—
USB portsUSB 3.2 Gen 1 Port—
Show all 31 specsShow fewer specs
SpecSynology DiskStation DS925+QNAP TS-233 2-Bay NAS
Raw capacity with expansionup to 180 TB—
Built-In Hard DriveNo—
Form Factor2.5", 3.5"—
USB-AYes—
RAIDYes—
SATAYes—
RAID LevelsRAID 10, RAID 0, RAID 1, RAID 5, RAID 6, JBOD—
Bays—2
CPU—ARM Cortex-A55 quad-core 2.0GHz
RAM—2GB DDR4

What reviewers say

Synology DiskStation DS925+

Owners of the DS925+ line praise the build quality, the dual 2.5GbE networking and the stable DSM software. The most common complaints concern the tighter drive compatibility list and the modest stock memory for virtualization.

What people mention
  • Drive compatibilityCriticisedOwners complain that only Synology-listed drives get full feature support, limiting cheaper third-party options.
  • Network speedPraisedReviewers highlight the dual 2.5GbE ports as a real step up for large file transfers.
  • MemoryMixedECC support is welcome, but the 4 GB stock configuration is seen as thin for virtualization.
  • Build qualityPraisedThe chassis and drive trays are described as sturdy and easy to service.

QNAP TS-233 2-Bay NAS

Owners of QNAP's entry two-bay units generally find them easy to set up and reliable for backups and media sharing. The common complaints are the fixed 2 GB of RAM and the single gigabit link, which keep transfers and app performance modest.

What people mention
  • MemoryCriticisedOwners say the fixed 2 GB of RAM runs short once several apps or containers are active.
  • Network speedMixedThe single Gigabit port is fine for home use but caps transfers near 110 MB/s.
  • SetupPraisedQTS guides new users through drive setup and RAID 1 without much trouble.
  • BackupPraisedScheduled backups and snapshot tools are cited as dependable.

Questions and answers

Which is better for Plex and video transcoding?
The DS925+. Its Ryzen V1500B has the CPU headroom for software transcoding and multiple streams. The TS-233's ARM chip and 2 GB RAM choke on heavy transcoding.
Which lasts longer as my storage grows?
The DS925+. Four bays, expansion to nine drives and 32 GB RAM support give it years of headroom. The TS-233 is capped at two drives and 2 GB RAM.
Is the DS925+ worth stepping up to from a two-bay NAS?
Yes if you run RAID 5, multiple users, VMs or 2.5GbE. For simple backups of one or two computers, the TS-233 covers it.
Which is easier to set up?
Both are guided wizards. QTS 5 on the TS-233 is slightly simpler for a first NAS; DSM on the DS925+ exposes more options once you go deeper.
Do either include drives?
The DS925+ ships without drives. The TS-233 is sold both bare and in bundles with drives installed.
Which is quieter?
The TS-233. Two drives and a low-power ARM chip run cooler and quieter than a four-bay x86 unit.

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Buying guides that pick them

  • Best NAS devices for home use
Network—1 x Gigabit Ethernet
USB—1 x USB 3.1 Gen 1, 2 x USB 2.0
OS—QNAP QTS 5
RAID Level—RAID 0, RAID 1
Type—NAS
Network Connectivity—Gigabit Ethernet, 10/100 Ethernet
Personal Cloud Storage—Yes
Installed RAM—2 GB RAM
Included Capacity—6 TB Storage, 16 TB Storage, 20 TB Storage