The ASUS NUC 14 Pro barebone is the best mini PC kit for most builders in 2026, and the Minisforum UM870 Slim is the best value kit if you want AMD. A kit ships with the case, motherboard, CPU and power supply but usually no memory, storage or operating system, so you add those yourself and often save money if you already own spare parts.
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Our Top Picks
ASUS NUC 14 Essential Barebone Kit Mini PCUltra Small5.31 x 4.53 x 1.42 inches2.05 PoundsCheck on Amazon
Top 3 picks at a glance
Quick Comparison of the Best Mini PC Kits
| Pick | Best for | Key specs | Price range |
|---|---|---|---|
| ASUS NUC 14 Pro barebone | Best overall | Intel Core Ultra processors, up to 96GB DDR5 SODIMM, low idle power | Mid to upper-mid |
| ASUS NUC 15 Pro barebone | Best newest platform | Core Ultra 5 225H, Wi-Fi 7, Thunderbolt 4 | Upper-mid |
| Minisforum UM870 Slim barebone | Best AMD value | Ryzen 7 8745H class chip, slim chassis, USB4 | Mid-range |
| Minisforum MS-01 | Best for homelab | Dual 10G SFP+ and dual 2.5GbE, PCIe expansion | Upper-mid |
| Minisforum AI X1 Pro barebone | Best performance | Ryzen AI 9 HX 370, OCuLink | Upper-mid to premium |
| ASRock DeskMini 310 | Best budget DIY | Mini-STX style, desktop CPU socket, small case | Budget |
Best Overall: ASUS NUC 14 Pro
ASUS took over Intel’s NUC line, and the NUC 14 Pro barebone remains the reference design: a tidy metal chassis, Intel Core Ultra processors, DDR5 SODIMM slots that support up to 96GB, and efficient idle power. Homelab and Proxmox comparisons often single it out for low idle draw.
The trade-offs are cost and networking. It is among the pricier barebones for its class, and it has a single 2.5GbE port. ASUS also has a better reputation for support than most smaller vendors. Pick it if you want a stable, quiet kit that will run for years.
Best Newest Platform: ASUS NUC 15 Pro
The NUC 15 Pro Tall barebone steps up to a Core Ultra 5 225H, Wi-Fi 7 and Thunderbolt 4, giving you a more future-friendly set of connectors. It suits buyers who plan to keep a kit for a long time or want faster wireless.
Because the platform is newer, it usually costs more than last year’s chassis and the performance gain over the 14 Pro can be modest in everyday use.
Best AMD Value: Minisforum UM870 Slim
The UM870 Slim packs a Ryzen 8000-series processor into a thin chassis and offers USB4 plus multiple video outputs. Roundups pick it for price-to-performance among barebone systems.
It has less expansion than the larger Minisforum models and the thin case limits cooling headroom. Choose it for office, media and light gaming.
Best for Homelab: Minisforum MS-01
The MS-01 is a small form factor workstation with dual 10G SFP+ ports, dual 2.5GbE and PCIe expansion, which is why home server fans love it. It can run virtualization, network storage and routing duties in one box.
It is bigger and louder than a normal mini PC and draws more power. For a desk PC, it is more than you need.
Best Performance: Minisforum AI X1 Pro
The AI X1 Pro barebone uses the Ryzen AI 9 HX 370 and includes an OCuLink port for external graphics. It is the quickest kit in this list for mixed work and light gaming.
Barebone versions require you to supply memory and storage, which adds to the final cost, and performance under sustained load depends on fan noise tolerance.
Best Budget DIY: ASRock DeskMini 310
The DeskMini series takes a desktop processor in a small case, letting you reuse an older chip and spare drives. It is the cheapest route to a working compact PC if you already have parts.
It is based on an older platform, offers limited ports and requires a CPU cooler that fits the tiny case. Treat it as a project, not a plug-and-play box.
Worked Example: Total Build Cost and Compatibility
A barebone kit price is only the starting point. Add up the extras before comparing it to a complete mini PC:
| Item | Typical need | Check |
|---|---|---|
| Memory | 2 x 16GB DDR5 SODIMM (32GB) | DDR5 vs DDR4 and maximum speed from the spec sheet |
| Storage | 1TB M.2 2280 NVMe | PCIe 4.0 vs 3.0 slot, second slot availability |
| Operating system | Windows license or Linux | Kit usually ships without one |
| Wireless | Wi-Fi card | Some kits include it, some do not |
As a rule, if a barebone costs 15 to 20 percent less than a similar complete system and you already own at least one of RAM or SSD, the kit wins. If you need to buy both, the savings usually disappear and a complete mini PC with a warranty on every part is simpler.
How to Choose a Kit
| Your situation | Choose |
|---|---|
| Reliable desktop with strong support | ASUS NUC 14 Pro or 15 Pro |
| AMD value and USB4 | Minisforum UM870 Slim |
| Virtual machines, network storage | Minisforum MS-01 |
| Fast CPU plus external GPU option | Minisforum AI X1 Pro |
| You own old desktop parts | ASRock DeskMini 310 |
Things to Verify Before Buying
- Memory type and speed: SODIMM DDR5 and DDR4 are not interchangeable.
- Drive slots: check the number of M.2 slots and whether a 2.5-inch bay exists.
- Power adapter: some kits ship with regional plugs, so confirm it matches your outlet.
- Cooling: allow airflow, and consider a low-profile SSD heatsink for sustained transfers.
Mistakes to Avoid When Building From a Kit
The most frequent error is buying memory that does not match the board. SODIMM DDR5 and DDR4 look similar but do not fit the same slots, and speed ratings above the supported maximum will be downclocked. Always read the manufacturer’s memory support list. A close second is choosing a slow SSD: a PCIe 3.0 drive is fine for a media box, but a developer or editor benefits from a PCIe 4.0 model if the slot supports it.
Another trap is forgetting the operating system. A kit without a license means paying for Windows or installing Linux, and some vendors offer BIOS updates only through Windows tools, so plan for that. Finally, install an SSD heatsink if the kit has room, and avoid blocking the vents with cables, since small coolers work hard in compact cases.
Step-by-Step: First Boot Checklist
- Install the memory at an angle and press until the clips lock.
- Fit the SSD in the primary M.2 slot and secure it with the screw.
- Connect a monitor, keyboard and power, then enter the BIOS to confirm the memory and drive are detected.
- Update the BIOS if the vendor recommends it, then install the operating system from a USB drive.
Frequently Asked Questions
What is a mini PC kit?
It is a barebone system with the chassis, motherboard, processor and power supply included. You supply memory, storage and an operating system.
Is a barebone mini PC cheaper than a complete one?
Often yes, if you can reuse RAM and a drive. If you must buy every part new, the gap narrows or disappears.
Can I upgrade a barebone mini PC later?
Memory and SSDs are usually upgradeable, but the processor is soldered on most models. Only DeskMini-style kits with a socket allow CPU swaps.
Which mini PC kit is best for Proxmox or a home server?
The Minisforum MS-01 stands out for its networking, while the ASUS NUC 14 Pro stands out for low idle power. The choice depends on whether you value ports or efficiency.
Do mini PC kits come with Windows?
Most barebones do not. Budget for a license or install a free Linux distribution.
