Minisforum UM790 Pro Review: A Server That Fits in a Hand

Updated 2026-08-21 Researched, not tested in person Vendor neutral

Quick answer

A Ryzen 9 7940HS with eight cores and sixteen threads, 32GB of DDR5 expandable to 64GB, two PCIe 4.0 M.2 slots and two USB4 ports, in a box you can hold. Buy it if your home server is about running things rather than storing things. Skip it if you need bulk storage, because two NVMe slots is the entire storage story and everything else hangs off USB.

Ryzen 9 with sixteen threads, two NVMe slots and no drive bays at all, which is the whole decision.

Most Compute Per Watt

Minisforum Venus UM790 Pro Mini PC, AMD Ryzen 9 7940HS, 32GB DDR5, 1TB SSD

~$839

A mini PC with a Ryzen 9 7940HS at up to 5.2GHz, Radeon 780M graphics, 32GB DDR5-5600, two PCIe 4.0 M.2 slots, USB4 and Wi-Fi 6E.

Check price on Amazon

Specifications

CPU	AMD Ryzen 9 7940HS, 8 cores and 16 threads, up to 5.2 GHz, TSMC 4 nm
Graphics	AMD Radeon 780M at 2.8 GHz
Memory	32 GB DDR5-5600 SODIMM, dual channel, expandable to 2 x 32 GB
Storage	Two M.2 2280 PCIe 4.0 slots supporting RAID 0 and RAID 1
Cooling	Cold Wave 2.0 liquid metal system with active memory and SSD cooling
Networking	Wi-Fi 6E and Bluetooth 5.3, up to 2.4 Gbps
Ports	2 x USB4 at 40 Gbps with PD in and out, HDMI 2.1

Specifications above come from Minisforum's published specifications. Treat pricing as approximate, since Amazon pricing moves.

What it does well

Sixteen threads of current-generation Ryzen is more CPU than any consumer NAS offers, and it is the reason to build a server on a mini PC rather than an appliance.
Two PCIe 4.0 M.2 slots with RAID 0 and RAID 1 support means you can mirror the boot and application storage, which most mini PCs cannot.
USB4 at 40 gigabit makes external storage genuinely fast, so a DAS enclosure attached here is not the bottleneck it would be over USB 3.
The Radeon 780M handles hardware transcoding well, which covers most of what a home media server asks of a GPU.
Idle power on a mobile-class Ryzen is far below a desktop build, and a home server runs continuously.

Where it falls short

There are no drive bays. Bulk storage means an external enclosure, and that adds a box, a power supply and a cable that can be knocked out.
Two NVMe slots is not a storage strategy for a media library. It is a storage strategy for an operating system, containers and a cache.
Mini PC cooling is compact by definition. Under sustained full load these run warm and the fan is audible, which is a different profile from a NAS that idles most of the time.
You are assembling the server yourself. There is no DSM, no built-in backup application and no web interface until you install one.
Wi-Fi 6E is not how a server should be connected. Check the wired networking speed on the specific configuration you buy and plan on using it.

What owners report

Owner reports on Minisforum mini PCs are strong on performance per watt and per dollar, with the usual mini PC caveats about fan noise under load and about BIOS updates being more of an event than on a mainstream brand. As home server hosts they are well regarded, and the recurring advice from people running them is to treat storage as a separate problem from compute.

That is the real decision, and our mini PC versus prebuilt NAS comparison covers it directly. A mini PC gives you far more compute for the money and no bays; a NAS gives you bays, software and less CPU. Many good home setups are both, with the mini PC running services and the NAS holding data.

If you are weighing this against reusing an old desktop, read our repurposed desktop versus new mini PC comparison. The point that surprises people is in the electricity: an old desktop drawing 90 watts continuously can cost more in a year than a mini PC costs to buy. Our power draw calculator does the arithmetic.

Who it suits

Home servers that run containers, virtual machines and media services rather than storing bulk data.
Anyone pairing a compute box with an existing NAS or DAS enclosure.
Builds where idle power draw across a year is a real cost.

Who should skip it

Anyone whose primary need is many terabytes of storage.
Buyers who want an appliance with backup and file sharing already built.
Silent installations, since mini PC fans work hard under sustained load.

Alternatives worth considering

Cheaper Compute

Beelink SER5 MAX Mini PC, Ryzen 7 7735U, 16GB LPDDR5, 500GB SSD

~$469

Eight cores and sixteen threads with 2.5GbE networking for a little over half the price. Less memory, soldered LPDDR5 rather than SODIMM, and one M.2 slot rather than two, so it is a simpler machine for a simpler job.

Check price on Amazon

Barebones and Serviceable

ASUS NUC 15 Pro Tall Barebones Mini PC, Core Ultra 5 225H

~$528

A tool-less chassis you populate yourself with memory and storage, from a line with a long history of firmware support. Buying barebones means paying only for the parts you actually want.

Check price on Amazon

If You Need Bays

UGREEN DXP4800 Plus 4-Bay NAS

~$620

Four SATA bays, a 10GbE port and a NAS operating system for less than this mini PC. If the requirement is storage rather than compute, this is the correct shape of machine.

Check price on Amazon

Keep reading

This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.

Frequently asked questions

Can a mini PC be a home server?

Yes, and it is one of the best options for a server that runs services rather than stores data. You get far more CPU per dollar and per watt than a NAS offers. What you do not get is drive bays, so bulk storage has to live in an external enclosure or on a separate NAS.

How much storage can a mini PC take?

This one takes two M.2 2280 NVMe drives, which currently means up to a few terabytes each, and it supports RAID 0 and RAID 1 across them. That is plenty for an operating system, containers and application data. It is not a media library. External storage over USB4 is the usual answer for bulk.

Mini PC or a NAS for a home server?

A NAS if the point is storing data, because bays and storage software are what you are buying. A mini PC if the point is running things, because you get several times the compute for the money. Plenty of good setups run both, with the mini PC handling services and the NAS handling data.

Is an old desktop cheaper than a mini PC?

Often not, once you count electricity. A desktop drawing 90 watts continuously across a year uses far more power than a mini PC drawing 15, and the difference can exceed the price of the mini PC. Our power draw calculator turns your local rate into an annual figure.

Does it need a UPS?

Any always-on server benefits from one, and a machine hosting virtual machines or a database benefits more, because an abrupt power loss during a write is what corrupts things. A UPS large enough for a clean shutdown is the minimum sensible provision.

How we choose: we compare published manufacturer specifications, drive datasheets, published reliability statistics and verified owner reviews. We do not test hardware in person, and we are not tied to any NAS vendor. Capacity and power figures here are researched guidance, not a warranty. RAID protects against drive failure, not against deletion, ransomware, fire or theft, so keep verified backups regardless of what any calculator tells you.

Working out your own cost per usable terabyte? The Home Server Build Planner is the paid version of these pages: 8 printable worksheets you fill in with your own numbers, plus the full PDF, $29.