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Silver barebone mini PC with compact rectangular chassis

minisforum

minisforum UM870 Slim barebone mini PC Ryzen 7 8745H 8C/16T 4.9 GHz Radeon 780M DDR5 Silver

SKU CH-48D3-YAGKF

Barebone mini PC with 8-core Ryzen 7 8745H and Radeon 780M graphics, supports 64 GB DDR5-5600, triple 8K@60 Hz output via HDMI 2.1 and USB4, plus 2.5 GbE and Wi-Fi 6E

  • ColorSilver
  • CPU SocketFP7r2 , FP8
  • CPU TypeAMD Ryzen 7 8745H
  • CPU Cores8-Core
  • Integrated GraphicsAMD Radeon 780M
  • Wireless LAN802.11ax

Options UM870 Slim · 0+0

Struck-through versions exist but are not stocked here.

  • 8 cores and 16 threads handle heavy multitasking smoothly with Ryzen 7 8745H up to 4.9 GHz
  • Radeon 780M graphics on RDNA 3 architecture deliver high frame rates for light gaming and content creation
  • Three independent displays supported: 8K at 60 Hz via HDMI 2.1 and USB4, 4K at 60 Hz via DisplayPort
  • 5 GbE LAN plus Wi-Fi 6E and Bluetooth 5.3 provide fast, stable wired and wireless connectivity
  • Two DDR5-5600 SODIMM slots expand to 64 GB dual-channel memory and one PCIe 4.0 SSD slot adds high-speed storage

Compact barebone for custom builds

The minisforum UM870 Slim arrives as a barebone mini PC with an AMD Ryzen 7 8745H processor already installed. Eight cores and sixteen threads reach a 4.9 GHz boost clock, while integrated Radeon 780M graphics handle display output. The silver chassis targets builders who want to choose their own DDR5 memory, storage and operating system.

Two SODIMM slots and PCIe 4.0 storage

Dual-channel DDR5-5600MHz SODIMM slots accept up to 64 GB total, with each slot supporting 32 GB modules. A PCIe 4.0 x4 M.2 slot provides room for a primary SSD, and a second PCIe 4.0 slot is available for extra capacity. Video outputs comprise HDMI 2.1, DisplayPort and USB4, each capable of 8K at 60 Hz for three independent screens. Wired networking uses a 2.5G RJ45 port, while Wi-Fi 6E and Bluetooth 5.3 handle wireless duties.

Sustained output in a small enclosure

The 8745H processor maintains its 4.9 GHz boost within the slim thermal envelope, allowing extended compile sessions or rendering jobs without the sharp throttling seen in shorter bursts. Radeon 780M graphics deliver steady frame rates during long gaming or compute workloads rather than peaking briefly. Builders who need discrete GPU performance or more than two memory channels should look elsewhere.

Highlights

  • 8 cores and 16 threads handle heavy multitasking smoothly with Ryzen 7 8745H up to 4.9 GHz
  • Radeon 780M graphics on RDNA 3 architecture deliver high frame rates for light gaming and content creation
  • Three independent displays supported: 8K at 60 Hz via HDMI 2.1 and USB4, 4K at 60 Hz via DisplayPort
  • 5 GbE LAN plus Wi-Fi 6E and Bluetooth 5.3 provide fast, stable wired and wireless connectivity
  • Two DDR5-5600 SODIMM slots expand to 64 GB dual-channel memory and one PCIe 4.0 SSD slot adds high-speed storage

Specifications

BrandMINISFORUM
ModelDeskMini
ColorSilver
CPU SocketFP7r2 , FP8
CPU TypeAMD Ryzen 7 8745H
CPU Cores8-Core
Integrated GraphicsAMD Radeon 780M
Wireless LAN802.11ax
BluetoothBluetooth 5.3
WiFi GenerationWi-Fi 6E
HDMI1
DisplayPort1 x DisplayPort
RJ451
Memory slot2
Memory Type SupportedDDR5-5600MHz
Max Memory Supported64GB
Dual Channel Memory SupportedYes
Memory installedNo Memory
OtherPCIe4.0x4

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How much DDR5-5600 memory can the UM870 Slim accept before the limit is reached?

The board provides two SODIMM slots with dual-channel support and a maximum capacity of 64 GB using DDR5-5600 modules.

What are the thermal and acoustic characteristics when the Ryzen 7 8745H runs at 4.9 GHz all day?

The compact chassis relies on an internal fan to cool the 8-core processor and Radeon 780M graphics; sustained boost clocks will raise both surface temperature and fan speed.

Which storage and memory parts must I supply to make this barebone operational?

You need to add DDR5-5600 SODIMM modules (up to 32 GB per slot) and at least one PCIe 4.0 M.2 SSD; the system ships without RAM, storage or an operating system.

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