REATAN

Alloy 9 / UM790 Pro

CPU r7 7940HS

GPU RDNA3 780M

Max RAM 64GB

Drives 2

From $570

Seller Amazon

The REATAN Alloy 9 / UM790 Pro is a mini PC powered by the AMD r7 7940HS (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 64GB 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: 127 × 127 × 45mm (0.73L).

CPU & Performance

CPUr7 7940HS

GenerationZen 4

P-Cores8

Threads16

Single-core77

Multi-core44

Socket0

GPU

GPURDNA3 780M

Discrete GPUNo

Integrated GPUYes

eGPU supportNo

RAM

Max RAM64GB

RAM slots2

Max speed5600 MT/s

ECC supportNo

Storage

Max drives2

NVMe slots2

Gen4 x42

SD cardNo

Ports & Connectivity

HDMI 2.12

USB4 40Gbps2

Max displays4

Network

Max Ethernet1G

2.5G ports1

vProN

Physical

Dimensions127 × 127 × 45 mm

Volume0.73L

Fan size80mm

Warranty1 yr

Power

TDP45W

Pricing

32GB / 1TB$570

64GB / 1TB$710

Additional

Recommended for productivity, software development, multitasking, media use, light gaming, larger multitasking workloads, and very small desk setups. Consider REATAN Alloy 9 / UM790 Pro if you want a ultra-compact mini PC built around its listed AMD r7 7940HS 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.

REATAN Alloy 9 / UM790 Pro features AMD r7 7940HS 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 64GB 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 4 displays. Port connectivity includes 2× USB4 40Gbps, 2× HDMI 2.1, and full-function USB-C with PD/video/data at 100W. Networking includes 1× 2.5G Ethernet. Physical design includes a 127 × 127 × 45 mm chassis (0.73L). Cooling information lists 80 mm main fan and 40 mm secondary fan. Power information lists 45W TDP. Lifecycle information lists 1-year warranty.

The overall score is not populated for REATAN Alloy 9 / UM790 Pro, so this model should be evaluated by the listed hardware specifications rather than by a ranked dataset position.

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 REATAN Alloy 9 / UM790 Pro is a ultra-compact mini PC built around AMD r7 7940HS and AMD RDNA3 780M integrated graphics. With a listed price around $570, 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 64GB 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 2 USB4 40Gbps, 2 HDMI 2.1, USB-C PD up to 100W. Because the overall score is not populated, this model is best evaluated by its listed specifications, price, and feature mix rather than a single rank. 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 REATAN Alloy 9 / UM790 Pro 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

May 14: out of stock for a month or two, back in stock, 32GB/1TB model went from $540 to $570. Nov 23 2024: $430 to $390. Oct 13 2024: $530 to $430. May 8 2024: $530 to $430. May 1 2024: $450 to $530. April 18 2024: found a sales listing claiming two hdmi 2.1 ports and USB C ports supported alt pd for single cable connectivity. Feb 19 2024: $550 to $450. Feb 13 2024: Robtech review claims to have been able to power the mini pc with one of the USB4 ports and there is a second 40mm fan and a second m.2 gen 4 drive slot. Amazon offered a 3 year extended warranty.