Neither an old PC nor a dedicated NAS is automatically better for a media server. Reuse a PC if its storage connections and processor or graphics hardware fit your library and playback needs; choose a dedicated NAS if a specific model offers the bays, management features, and Plex support you need. The key question is often whether your playback devices can direct-play your files or whether the server must transcode them.
How to choose between an old PC and a dedicated NAS
Start with the work your server will actually do, then compare the exact hardware and storage setup—not just the product categories. Plex Media Server can run on compatible computers and NAS devices, but compatibility and performance depend on the specific system. See Plex’s system requirements.
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- An old PC is a better fit when you already own suitable hardware, need flexible component choices, and can configure and maintain the system.
- A dedicated NAS is a better fit when a particular appliance provides the drive bays, storage capacity, management features, and model-specific Plex capabilities you want.
- Neither is a safe choice by category alone if the media workload depends on transcoding. Check the exact processor or graphics hardware and the expected number and type of streams.
Will the server direct-play your media or need to transcode?
Direct play means the playback device can use the media as stored, so the server may not need to convert it. If the device does not support a file’s format, or playback settings or remote-streaming conditions require a different format or quality, Plex may need to transcode. The clients in your home and the files in your library therefore matter as much as the server. Plex explains this distinction in its NAS decision guide.
Direct play: compare your actual devices and files
Check the formats and quality of your existing media against the playback devices you use, including any remote clients. If those clients can play the files directly, the server can avoid much of the processing associated with conversion. Do not assume that direct play will always be possible: client support, quality settings, and remote playback can change what Plex needs to do.
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Transcoding: verify the exact model’s capabilities
Software transcoding uses the device’s CPU; hardware-accelerated transcoding uses compatible hardware. Plex’s NAS Compatibility List distinguishes these capabilities and warns that some low-power NAS devices cannot transcode. Its estimates for software transcoding concern one transcode of a sample quality, not a promise of performance for every codec, resolution, or number of simultaneous streams. For an old PC, check its specific CPU or graphics hardware and software support; for a NAS, check the exact model rather than relying on the brand or bay count.
Plex says hardware-accelerated streaming works on modern Windows, Mac, Linux, and NAS devices when hardware and software requirements are met. Its guidance identifies Intel Quick Sync support and lists server-version requirements; for reliable HEVC output transcoding on NAS devices, it specifies Jasper Lake or better. These requirements can change, so consult Plex’s current hardware-accelerated streaming guidance before buying or configuring a server.
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Plex describes hardware-accelerated streaming as a premium feature requiring an active Plex Pass. It can reduce processing load and help with concurrent streams, but Plex notes that hardware encoders can produce lower output quality than software encoders in some circumstances, and earlier hardware generations may produce lower-quality output. Confirm both feature eligibility and the quality trade-off for your use case.
Compare storage, setup, and ongoing ownership
| Factor | Old PC used as a NAS | Dedicated NAS |
|---|---|---|
| Media-server hardware | Depends on the PC’s specific CPU, graphics hardware, and software support. Verify its suitability for the formats, resolutions, and streams you expect. | Depends on the exact NAS model. Check Plex’s compatibility information; some low-power devices cannot transcode. |
| Drive connections and capacity | Depends on the available drive connections, space, and supported storage configuration of the PC and its operating system. | Depends on the model’s drive-bay count, supported drives, and expansion options. Confirm these against the capacity you need. |
| Setup and administration | Offers flexibility in component choices, but you are responsible for assembling, configuring, and maintaining the system. | Provides the management features of the selected appliance; check its exact software and feature set rather than assuming all models are alike. |
| Cost | Compare the additional parts, drives, and any required software or subscription against what you already own. | Compare the complete appliance and drive cost, plus any required software or subscription. Prices vary and should be checked when purchasing. |
Storage hardware and configuration
An old PC can be repurposed, but the storage operating system still has requirements. TrueNAS says it can run on almost any x86 computer, while its archived SCALE 24.04 hardware guide cautions against hardware RAID cards and notes that consumer desktop SATA drives are not designed or warranted for continuous operation or RAID groups. Those are TrueNAS-specific recommendations, not universal rules for every NAS operating system. Read the archived TrueNAS SCALE 24.04 hardware documentation if you plan to use that platform.
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A dedicated appliance bundles a defined set of bays, ports, and management features, but its specifications are model-specific. For example, the June 2025 TrueNAS Mini datasheet lists different models with different bay counts, ports, management features, and maximum power figures, and recommends drives designed for NAS systems. A datasheet helps you compare products; it does not establish how much electricity an arbitrary appliance will use in your home.
Power, noise, and space
There is no established universal power winner between an old PC and a dedicated NAS. Consumption depends on the complete system, including its drives, components, settings, and workload; noise and physical space also depend on the actual hardware and placement. Compare systems with similar numbers of drives under comparable idle and streaming workloads. Measure whole-system power at the wall, then estimate annual electricity cost as measured watts converted to kilowatts, multiplied by operating hours, multiplied by your local electricity price. State the workload and assumptions behind any estimate.
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Keep redundancy separate from backup
Drive redundancy can help a storage system remain available after a drive failure, but RAID is not a backup. Important media and files need an independent backup—one that does not depend on the same NAS or PC and its storage array. Choose a storage configuration supported by your operating system, and plan how you will recover files if the server or its drives are lost.
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Use this decision checklist
- List your clients and media. Identify the playback devices, formats, quality settings, and remote-use patterns in your household; determine where direct play is likely and where transcoding may be needed.
- Check server capability. For an old PC, verify its processor or graphics hardware and software support. For a dedicated NAS, check the exact model in Plex’s compatibility information and match it to the codecs, resolution, and simultaneous streams you expect.
- Confirm storage fit. Count the drives and capacity you need, then check connections, bays, supported configurations, and expansion options for the PC or NAS model.
- Compare the complete cost and ownership work. Include hardware you already own, any parts or drives required, software or subscription needs, and the setup and maintenance you are prepared to handle.
- Plan for power and data recovery. Measure power under comparable use if electricity matters, and maintain an independent backup for important files.
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