Minisforum UM870 Slim
Minisforum

UM870 Slim

CPU r7 8745H/7840HS
GPU RDNA3 780M
Max RAM 96GB
Drives 2
From $320
Seller Amazon

The Minisforum UM870 Slim is a mini PC powered by the AMD r7 8745H/7840HS (Zen 4 gen). It features 8 performance cores and 16 threads and a soldered CPU. Graphics are handled by the integrated AMD RDNA3 780M. Supports up to 96GB of RAM across 2 slots at 5600 MT/s. Storage capacity of up to 2 drives including 2 NVMe. Connectivity includes USB4 40Gbps, HDMI 2.1. Networking features 1 Ethernet port (up to 2.5G). Dimensions: 130 × 126 × 52mm (0.85L). Uses a Brick PSU, 60W TDP.

CPU & Performance

CPUr7 8745H/7840HS
GenerationZen 4
P-Cores8
Threads16
Single-core76
Multi-core44
Socket0

GPU

GPURDNA3 780M
Discrete GPUNo
Integrated GPUYes
eGPU supportNo

RAM

Max RAM96GB
RAM slots2
Max speed5600 MT/s
ECC supportNo

Storage

Max drives2
NVMe slots2
Gen4 x42
SD cardNo

Ports & Connectivity

HDMI 2.11
USB4 40Gbps1
Max displays3

Network

Max Ethernet1G
2.5G ports1
vProN

Physical

Dimensions130 × 126 × 52 mm
Volume0.85L
Fan size85mm
Warranty2 yr

Power

TDP60W
PSU typeBrick

Pricing

Minimum$615
Barebone est.$320
32GB / 1TB$615

Additional

Recommended for productivity, software development, multitasking, media use, light gaming, memory-heavy workloads, and very small desk setups. Consider Minisforum UM870 Slim if you want a ultra-compact mini PC built around its listed AMD r7 8745H/7840HS processor and AMD RDNA3 780M integrated GPU. It is less suitable for heavy gaming than models with a discrete GPU, but the listed expansion and integrated graphics options make it flexible for everyday workloads.

Minisforum UM870 Slim features AMD r7 8745H/7840HS with AMD RDNA3 780M integrated GPU, offering 1× 2.5G Ethernet and USB4 and HDMI 2.1. CPU details include Zen 4 CPU generation, 8 performance cores, and 16 threads. Memory support includes up to 96GB RAM across 2 slots at 5600 MT/s. Storage support includes up to 2 storage drives including 2 NVMe SSD slots and 2× PCIe Gen4 x4 NVMe. Display support includes support for up to 3 displays. Port connectivity includes 1× USB4 40Gbps, 1× HDMI 2.1, and full-function USB-C with PD/video/data at 100W. Networking includes 1× 2.5G Ethernet. Physical design includes a 130 × 126 × 52 mm chassis (0.85L). Cooling information lists 85 mm main fan and 40 mm secondary fan. Power information lists Brick power supply and 60W TDP. Lifecycle information lists 2-year warranty and release date listed as 8-Nov-2024.

Based on its overall score of 333.4, Minisforum UM870 Slim is positioned as a strong upper-range mini PC entry in this dataset; compare it against alternatives by CPU class, GPU type, memory ceiling, storage expansion, LAN, and port selection.

Verdict

Best for

productivity, light gaming, media editing, multitasking, developer workloads.

Avoid if

you need modern AAA gaming or sustained GPU rendering; you need multiple high-speed LAN ports for router or NAS duty.

Alternatives
  • Geekom A6 — better value at comparable performance
  • GMKtec/Morefine Nucbox K11 4090M — higher performance ceiling
  • CWWK/Topton 1245U 8x2.5G — stronger wired networking for homelab use

Review

The Minisforum UM870 Slim is a ultra-compact mini PC built around AMD r7 8745H/7840HS and AMD RDNA3 780M integrated graphics. With a listed price around $320, it is aimed at buyers looking for productivity, light gaming, media editing, multitasking, developer workloads. The core spec sheet is solid for its class: up to 96GB RAM across 2 slots at 5600 MT/s, up to 2 drives, including 2 NVMe slots (2 PCIe 4.0 x4 NVMe), 1×2.5GbE, and 1 USB4 40Gbps, 1 HDMI 2.1, USB-C PD up to 100W. Its 333.4 overall score puts it in the upper-middle part of this mini PC database, making it a credible shortlist candidate rather than just a budget filler. The listed release date is 8-Nov-2024. The main reason to pause is fit: avoid it if you need modern AAA gaming or sustained GPU rendering; you need multiple high-speed LAN ports for router or NAS duty. Overall, the Minisforum UM870 Slim makes the most sense when its CPU/GPU balance, port selection, and expansion profile match your workload; otherwise, compare it against similarly priced mini PCs with better networking, quieter cooling, or stronger upgrade paths.

Notes

Jan 14 2025: $288 to $320. Oct 9 2024: $230 to $200

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