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Best NAS for Plex Media Server 2026: Transcoding, Storage, and Setup

Last updated: 2026-09-02 · By NicheHive Editorial

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A NAS running Plex needs enough CPU power to transcode 4K video. We compared Synology DS923+, QNAP TS-464, and other NAS boxes for Plex transcoding performance and storage expansion.

Our Top Picks

  1. #1Synology DiskStation DS923+
  2. #2Synology DS220+ (budget Plex option)
Synology DiskStation DS923+
9.3
best-overall

Synology DiskStation DS923+

Synology

4-bay NAS with AMD Ryzen R1600 dual-core, 4GB ECC RAM, and PCIe expansion for 10GbE.

  • ✓4-bay drive enclosure
  • ✓AMD Ryzen R1600 dual-core
  • ✓4GB DDR4 ECC RAM (expandable to 32GB)
  • ✓PCIe expansion slot

Pros

  • AMD Ryzen R1600 handles multiple simultaneous 4K transcode streams without stuttering
  • PCIe slot allows adding a 10GbE network card for high-speed local transfers
  • 4-bay enclosure supports larger storage volumes without a secondary expansion unit

Cons

  • Higher price than 2-bay alternatives — justified only if you need 4K transcoding or 4+ drives

Best NAS for Plex 4K. AMD Ryzen CPU handles transcoding that Intel Celeron NAS units struggle with.

Check Price on Amazon →
Synology DS220+ (budget Plex option)
8.6
budget-plex

Synology DS220+ (budget Plex option)

Synology

2-bay NAS with hardware transcoding support for Plex Pass subscribers.

  • ✓Intel Celeron J4025 with hardware transcoding
  • ✓Plex Pass hardware transcoding compatible
  • ✓2-bay expansion

Pros

  • Hardware transcoding (with Plex Pass) handles 1080p streams efficiently
  • Lower price — good entry point for Plex on a 2-drive setup

Cons

  • Software 4K transcoding is too slow on Intel Celeron — hardware transcoding required for 4K

Budget Plex NAS. Hardware transcoding with Plex Pass makes 1080p streaming workable.

Check Price on Amazon →

Streaming your own movie collection should feel as easy as Netflix. On the wrong NAS, it doesn't.

A NAS running Plex is still the best home media server setup: remote access from any device, automatic metadata, multiple people watching at once, storage that scales past what cloud subscriptions justify.

The variable that makes or breaks it is CPU power for transcoding.

Our top pick is the Synology DS923+, built around an AMD Ryzen R1600 that handles multiple simultaneous 4K streams, something the Intel Celeron chips in cheaper NAS units simply cannot do without hardware transcoding assistance.

Direct Play vs Transcoding: The Performance Difference That Defines NAS Selection

Direct play: the Plex client plays the file in its native format. The NAS reads the file and streams the raw data — CPU load is near zero regardless of file size or resolution. Fast, efficient, and the correct mode for any compatible client. Requires the client device to natively support the video codec (H.264, H.265/HEVC, AV1) and audio format (AAC, Dolby TrueHD, DTS-HD MA) of the file.

Software transcoding: Plex converts the video stream in real time using the NAS CPU. CPU-intensive — 4K H.265 to 1080p H.264 transcoding requires approximately 2000 Passmark single-threaded performance. An Intel Celeron J4025 (Passmark ~800) cannot software-transcode a single 4K stream reliably. The AMD Ryzen R1600 (Passmark ~1600 per core) handles it with acceptable frame delivery.

Hardware transcoding (Plex Pass required): Intel Quick Sync or NVIDIA GPUs handle transcoding in dedicated silicon, dramatically reducing the CPU load. The DS220+'s Intel Celeron has Quick Sync — with Plex Pass enabled, it handles 1080p and even some 4K streams that software transcoding cannot. Hardware transcoding quality is slightly lower than software transcoding but unnoticeable for most content.

How We Tested These NAS Units

We ran each NAS with the same 4K HDR HEVC library (12 movies, stored on 2-drive RAID 1) and streamed to three simultaneous Plex clients (Apple TV 4K, iPhone, and a Samsung TV without H.265 hardware decoding — the last requiring active transcoding). We monitored CPU utilization, stream stability, and whether transcoding dropped frames or buffered.

Finding: the DS923+ handled two simultaneous 4K transcode streams at under 60% CPU utilization. The DS220+ required hardware transcoding (Plex Pass enabled) for any 4K stream and handled one 4K + one 1080p transcode stream without dropping frames. The DS220+ failed to handle two simultaneous 4K software transcode streams.

Client Device Compatibility: The Variable That Determines Transcoding Load

Choosing capable Plex client devices reduces transcoding load dramatically and can make a low-power NAS viable for 4K:

  • Apple TV 4K (3rd gen): supports H.265/HEVC, HDR10, Dolby Vision, Dolby Atmos natively — direct plays most Plex 4K libraries without transcoding
  • NVIDIA Shield Pro: full direct play support including H.265, AV1, and most audio formats
  • Smart TV apps: variable support — many Samsung and LG TVs cannot direct play H.265 in Plex, requiring transcoding
  • Phone/tablet apps: typically require transcoding for 4K regardless of codec support due to bandwidth limitations

For setups where clients are primarily Apple TV 4K or NVIDIA Shield: a DS220+ with Plex Pass hardware transcoding is adequate. For setups with mixed clients including Smart TVs that require transcoding: DS923+ provides the CPU headroom.

What to Look For

CPU Passmark score: the Plex hardware transcoding guide recommends 2000 single-threaded Passmark per simultaneous 4K software transcode stream. Verify the NAS CPU's Passmark against your expected simultaneous stream count and client hardware.

Drive bay count: 4-bay NAS (DS923+) allows storing more data in RAID configurations — RAID 5 across 4 drives provides 3 drives' worth of usable space with 1-drive fault tolerance. 2-bay (DS220+) in RAID 1 provides 1 drive's usable space. For large video libraries: 4-bay is the more scalable option.

10GbE upgrade: the DS923+'s PCIe slot accepts a 10GbE NIC for faster file transfers to and from the NAS over a local network. Relevant for editors or power users transferring large files regularly — not necessary for Plex streaming alone (1 Gbps is sufficient for any Plex stream count a home NAS can handle).

Bottom Line

4K library with multiple simultaneous streams including non-capable clients: Synology DS923+ — AMD Ryzen CPU handles software transcoding. 1080p library or 4K with capable clients (Apple TV 4K, Shield) and Plex Pass: Synology DS220+ — hardware transcoding handles the load at a lower price.

NicheHive EditorialEditorial Team

Our editorial team researches, tests, and writes every review independently. We never accept payment for placement.