MINISFORUM UM870 Slim Mini PC - Compact 8K Ready Mini PC

In this review the MINISFORUM UM870 Slim Mini PC stands out as a compact desktop aimed at users who want near-desktop performance in a small footprint. It is best for multitaskers and content creators who can install their own RAM and SSD, and the single biggest reason to consider it is the Ryzen 7 8745H paired with AMD Radeon 780M graphics, which delivers strong responsiveness for everyday work, light gaming and media tasks while keeping noise and size low.

Key Features

• Processor: The Ryzen 7 8745H (8C/16T up to 4.9Ghz) provides fast multi-threaded performance for editing, programming and multitasking without a full tower.
• Graphics: AMD Radeon 780M with RDNA 3 architecture gives above-average integrated GPU performance for light gaming and content creation on a mini PC.
• Display output: Multiple video ports including HDMI 2.1 and USB4 support 8K@60Hz output and allow up to three independent displays for expanded workflows.
• Networking: A 2.5G RJ45 port plus WiFi6E and Bluetooth 5.3 deliver stable, low-latency networking for streaming and remote work.
• Expandable storage and memory: Two DDR5 SODIMM slots and dual M.2 PCIe4.0 SSD slots let users upgrade memory and storage up to practical high capacities for demanding projects.
• Connectivity: A variety of USB ports, DisplayPort and a 3.5mm jack support common peripherals and audio without adapters.

Who It's For

The UM870 Slim is best for remote workers, content creators and power users who need a small desktop replacement that handles image editing, programming, multitasking and light gaming. Its strong integrated graphics and multiple display outputs make it a good fit for dual- or triple-monitor setups in tight spaces.

It is not ideal for users who want a ready-to-go machine with RAM, SSD and an operating system preinstalled, or for those who need a full desktop GPU for high-end AAA gaming or workstation-class compute; such buyers should look for a preconfigured desktop or a machine with a dedicated graphics card.

Pros & Cons

Pros

• Small chassis with a powerful Ryzen 7 8745H that boots and multitasks quickly.
• Impressive integrated AMD Radeon 780M performance for a mini PC, suitable for light gaming and content work.
• Versatile I/O including HDMI 2.1, USB4, DP and 2.5G LAN for fast networking and 8K display output.
• Upgradeable DDR5 memory and dual PCIe4.0 M.2 slots for future expansion.

Cons

• Sold as a barebone without RAM, SSD or OS, so initial setup requires extra parts and time.
• Some users report mixed impressions of cooling under sustained heavy loads.

Specifications

Our Verdict

The UM870 Slim Mini PC is a strong compact choice for users who want near-desktop Ryzen 7 performance and capable integrated RDNA 3 graphics in a small chassis. It offers excellent connectivity, upgrade paths and 8K display support, making it good value for anyone willing to supply RAM and SSD. Choose it if you need a quiet, expandable mini desktop for productivity and light creative work.

Frequently Asked Questions

Does the UM870 come with RAM or storage?
No, it is a barebone model shipped without RAM, SSD or an operating system, so you'll need to install DDR5 memory and M.2 SSDs.

Can it drive multiple 4K or 8K displays?
Yes, the UM870 has HDMI 2.1 and USB4 for 8K@60Hz plus a DisplayPort 1.4 for 4K@60Hz, supporting up to three independent displays.

Is it good for gaming?
It handles light and many modern games well on the AMD Radeon 780M, but it is not a substitute for a system with a discrete high-end GPU for AAA gaming at max settings.