Best Mini PC Under $500 2026: Beelink SER5 vs Minisforum UM790 Pro vs GMKtec K8 Plus

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The best mini PCs under $500: Beelink, Minisforum, and GMKtec picks for Proxmox, TrueNAS, and Home Assistant.

Sub-$500 mini PCs have become one of the most versatile home lab platforms – powerful enough for Proxmox with multiple VMs, quiet enough for a living room, and small enough to hide behind a monitor. This guide compares three of the most-purchased sub-$500 mini PCs in home lab communities.

Disclosure: affiliate links below. HomeNode earns commission on qualifying purchases through Amazon Associates at no additional cost to you. Recommendations reflect editorial synthesis of manufacturer specifications and public product information; check current pricing and reviews on Amazon before purchase.

The competitors in this comparison

  1. Beelink SER5 Pro 5825U — AMD Ryzen 7 5825U, 8-core, 16GB, 500GB NVMe.
  2. Minisforum UM790 Pro — AMD Ryzen 9 7940HS, 8-core, 32GB, 1TB NVMe.
  3. GMKtec NucBox K8 Plus — AMD Ryzen 7 8845HS, 8-core, 32GB, 1TB NVMe.

Fastest way to pick by use case

  • Best fit for entry Proxmox or Home Assistant: Beelink SER5 Pro 5825U. Ryzen 7 5825U, 16GB, established Beelink build quality at sub-$400 price.
  • Best fit for Proxmox with multiple VMs: Minisforum UM790 Pro. Ryzen 9 7940HS with 32GB standard, dual 2.5GbE.
  • Best fit for AI/ML home lab work: GMKtec NucBox K8 Plus. Ryzen 8845HS with integrated NPU for AI workloads.

Beelink SER5 Pro with AMD Ryzen 7 5825U – the mainstream sub-$400 mini PC for home lab.

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Key specifications:

  • CPU: AMD Ryzen 7 5825U (8-core, 16-thread)
  • RAM: 16GB DDR4 (upgradable to 64GB)
  • Storage: 500GB NVMe SSD
  • Network: 1x 2.5GbE + Wi-Fi 6
  • Display: dual HDMI 2.0 (4K@60Hz)
  • TDP: 15-28W

Features often highlighted by owners:

  • Established Beelink build quality
  • User-upgradable RAM and NVMe
  • Quiet fan under normal load
  • Solid Linux compatibility

Fits this use case: Entry Proxmox host with 3-5 VMs, Home Assistant Yellow alternative, dedicated Plex or Immich server.

Check current price and reviews on Amazon →

Minisforum UM790 Pro

Minisforum UM790 Pro with AMD Ryzen 9 7940HS – enthusiast tier with 32GB RAM standard.

See also: Best Mini PCs for Proxmox in 2026: Beelink vs Minisforum vs ASUS

Key specifications:

  • CPU: AMD Ryzen 9 7940HS (8-core, 16-thread)
  • RAM: 32GB DDR5 (upgradable to 96GB)
  • Storage: 1TB NVMe SSD
  • Network: 2x 2.5GbE
  • Display: 2x HDMI 2.1 + USB4 (up to 8K)
  • TDP: 35-65W

Features often highlighted by owners:

  • Dual 2.5GbE for pfSense/OPNsense router builds
  • 32GB RAM standard
  • DDR5 memory
  • USB4 with 40Gbps for external GPU or fast storage

Fits this use case: Proxmox with 5-10 VMs, pfSense or OPNsense router with 2.5GbE, dedicated dev workstation.

Check current price and reviews on Amazon →

GMKtec NucBox K8 Plus

GMKtec NucBox K8 Plus with AMD Ryzen 7 8845HS – latest-gen with integrated NPU for AI.

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Key specifications:

  • CPU: AMD Ryzen 7 8845HS (8-core, 16-thread) with XDNA NPU
  • RAM: 32GB DDR5
  • Storage: 1TB NVMe SSD
  • Network: 1x 2.5GbE + Wi-Fi 6E
  • Display: dual HDMI 2.1
  • TDP: 35-45W

Features often highlighted by owners:

  • AMD XDNA NPU for local AI workloads
  • DDR5 memory
  • Latest-generation Zen 4 architecture
  • Wi-Fi 6E

Fits this use case: Local AI/ML home lab work (Ollama, LM Studio), Proxmox with GPU-adjacent workloads, latest-generation architecture preference.

Check current price and reviews on Amazon →

Head-to-head specification comparison

Specification Beelink SER5 Pro Minisforum UM790 Pro GMKtec NucBox K8 Plus
CPU AMD Ryzen 7 5825U AMD Ryzen 9 7940HS AMD Ryzen 7 8845HS
RAM (standard) 16GB DDR4 32GB DDR5 32GB DDR5
Storage (standard) 500GB NVMe 1TB NVMe 1TB NVMe
Networking 1x 2.5GbE 2x 2.5GbE 1x 2.5GbE
AI NPU No No Yes (XDNA)
USB4 / TB No Yes No
Approximate MSRP tier $300-400 $500-600 $450-550

Which fits your use case

Final note

All products here have strong owner communities, active manufacturer support, and long track records. Specifications are drawn from manufacturer publications current at time of writing.

Building a homelab or self-hosting content site? Auburn AI has practical kits:

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.


For general informational purposes only; not professional advice. Posts may contain affiliate links. Learn more.
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