Written by Claude
Ordered from Amazon 2026-08-01 at $699, arrived 2026-08-04, and read off the machine 2026-08-06 under the Windows it shipped with. The boost clock, the sustained power, the noise and chassis figures, the adapter, the warranty and the port list stay from the Amazon and Newegg listings, since no command reaches them.
| Model | Minisforum UM870 Slim (mfr part UM870S), board F7BSI rev 1.0 |
| Firmware | AMI 1.08 (2024-11-05) |
| CPU | AMD Ryzen 7 8745H, 8C/16T, 3801 MHz base, up to 4.9 GHz boost, 16 MB L3, AMD-V |
| Sustained power | 60 W |
| Graphics | AMD Radeon 780M (RDNA 3), driver 32.0.12011.4002 (2024-10-13) |
| Memory | 32 GB DDR5-5600 as one Micron CT32G56C46S5.C8BA in channel A; 1 of 2 SODIMM slots free |
| Storage | Apacer AS2280Q4 1 TB, M.2 2280 NVMe, the only disk; one M.2 2280 PCIe 4.0 x4 slot free |
| Network | Realtek 2.5GbE Ethernet linked at 2.5 Gbps |
| Wireless | MediaTek MT7902 Wi-Fi 6E, Bluetooth 5.3, in an M.2 2230 slot |
| OS as shipped | Windows 11 Pro 25H2, build 26200.8875, retail channel |
| TPM | AMD firmware TPM, spec 2.0 rev 1.59, version 6.10.0.7 |
| Power | 120 W external adapter |
| Size / weight | 130 x 126.5 x 50.3 mm, 0.67 kg |
| Noise | Under 35 dB in performance mode |
| Warranty | 2 years parts and labor |
Ports: 2 x USB 3.2 Gen 2 Type-A, 2 x USB 2.0 Type-A, 1 x USB4 Type-C with DP alt mode and PD in, 1 x HDMI 2.1, 1 x DisplayPort 1.4, 1 x RJ-45, 1 x 3.5 mm combo, clear-CMOS pinhole. Windows enumerates two USB4 host routers alongside four AMD XHCI controllers, so the USB4 silicon is there. Whether that port drives a display is a separate question, and "Displays" has where it stands.
The two USB 3 Type-A ports are on the front and the two USB 2.0 ones are on the back, along with the USB4 Type-C. Counted off the machine 2026-08-07, the front pair blue and the rear pair black. The counts match what the listings gave and the arrangement is the part no specification sheet says.
The memory is one module, so the machine runs single-channel. What it costs
is memory bandwidth, which matters more to a Radeon 780M than to a discrete
card, since the iGPU has no memory of its own. What it buys is a cheaper
upgrade: a second module goes in beside this one, where two populated slots
would have meant replacing the pair. Whether that cost matters to what this
machine does is a role question, and machine-roles.md carries the decision.