GMKtec NucBox K4

Updated on June 21, 2026

The GMKtec NucBox K4 pairs an AMD Ryzen 9 7940HS processor with integrated AMD Radeon 780M graphics in a case that fits in the palm of your hand. Memory and storage are user accessible, so the machine can be taken up to 64GB of DDR5 and a 2TB PCIe 4.0 SSD after purchase.

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GMKtec NucBox K4 Comparison Chart

	GMKtec NucBox K4	GMKtec NucBox K4
Price	List Price: $849.99 Amazon Prices: Check Price on Amazon	List Price: $797.99 Amazon Prices: Check Price on Amazon
Version	32GB/2TB/AMD Ryzen 9 7940HS	32GB/1TB/AMD Ryzen 9 7940HS
Performance Rating	9.3	9.3
Operating System	Windows 11 Pro	Windows 11 Pro
Processor	Octa-core 4.00 Ghz (max 5.20 Ghz) AMD Ryzen 9 7940HS	Octa-core 4.00 Ghz (max 5.20 Ghz) AMD Ryzen 9 7940HS
GPU	Integrated AMD Radeon 780M	Integrated AMD Radeon 780M
RAM	32 GB	32 GB
Internal Storage	2 TB	1 TB
Dimensions width x length x thickness	4.84 x 4.4 x 1.7 inches (122.94 x 111.76 x 43.18 mm)	4.84 x 4.4 x 1.7 inches (122.94 x 111.76 x 43.18 mm)
Weight	0.93 lbs (0.42 kg)	0.93 lbs (0.42 kg)
WiFi	Wi-Fi 6 (802.11ax)	Wi-Fi 6 (802.11ax)
Bluetooth	Bluetooth 5.2	Bluetooth 5.2
Ethernet	1 Ethernet port at 2.5 Gbps	1 Ethernet port at 2.5 Gbps
HDMI	2 Full-Size HDMI Ports	2 Full-Size HDMI Ports
DisplayPort	DisplayPort 1.4 over USB-C	DisplayPort 1.4 over USB-C
VGA	No VGA Ports	No VGA Ports
USB Ports	1 USB 2.0, 3 USB 3, 1 USB-C (1 USB4) (USB-C full-featured, supports USB4.0 up to 40Gbps)	1 USB 2.0, 3 USB 3, 1 USB-C (1 USB4) (USB-C full-featured, supports USB4.0 up to 40Gbps)
Thunderbolt Ports	No	No
OCuLink	No	No
Internal SATA Ports	No SATA ports	No SATA ports
Card Reader	No Card Reader	No Card Reader
Headphone Jack	combo	combo
Fanless	No	No
VESA Mount	Yes	Yes
In the Box	GMKtec Nucbox K4, Power Adapter, VESA Mount with Screws, HDMI Cable, User Manual	GMKtec Nucbox K4, Power Adapter, VESA Mount with Screws, HDMI Cable, User Manual
Expandability	Memory and NVMe are user accessible and replaceable	Memory and NVMe are user accessible and replaceable

Upgradeable memory and storage in a 0.93-pound shell

At 4.84 x 4.40 x 1.7 inches and 0.93 lbs, the K4 is easy to carry between desks. A pop-off lid opens the case without tools, and behind it sit the DDR5 memory, which tops out at 64GB, and a single M.2 slot that takes a PCIe 4.0 drive of up to 2TB. There is no second drive bay, so that slot holds all the internal storage the machine will ever have.

Two HDMI 2.0 outputs and a full-featured USB-C port carrying USB4 and DisplayPort 1.4 handle video. Alongside the USB-A ports it has a 2.5G Ethernet jack, Wi-Fi 6, and Bluetooth 5.2. A VESA mount and its screws ship in the box, so the machine can hang behind a monitor rather than sit on the desk.

Windows 11 Pro comes pre-installed and the hardware also runs Linux. Idle power draw sits around 11 watts and climbs to 79 watts under heavy load.

Benchmarks are strong and the CPU hits 102.5°C

Insights from ETA PRIME

ETA PRIME’s review covers the hardware and its performance. He called the Ryzen 9 7940HS APU and Radeon 780M iGPU “the most powerful APU on the market.” He liked the choice between a fully configured system and a bare-bones kit, and the ease of upgrading the components.

He ran demanding games at respectable frame rates and measured a maximum consumption of 79 watts under heavy load. The reviewer concludes that the K4 offers high performance in a small package, suitable for various applications, from casual computing to gaming. The potential to increase the TDP for enhanced performance is also mentioned as an option for power users.

Team Pandory’s Perspective

Team Pandory’s review emphasizes the K4’s compact size and premium feel. The device’s hardware specifications, including the 8-core Ryzen CPU, 32GB of DDR5 RAM, and 1TB PCIe 4 NVMe SSD, are lauded for their ability to easily handle diverse tasks such as 4K video streaming and content production.

The review highlights the machine’s strong multi-core processing capabilities and its prowess in emulation. The possibility of adjusting the TDP in the BIOS is discussed, with a cautionary note about potential overheating. Despite concerns about cooling and early-stage drivers, the K4 is recommended for productivity and emulation enthusiasts.

TechTablets’ Technical Analysis

TechTablets ran thermal tests alongside the benchmarks. Chris praises the toolless design, noting that internal access is achieved by simply removing the pop-off lid, making RAM and SSD upgrades straightforward. The benchmarks show strong performance, with Cinebench R23 scores of 13,037 multi-core and 1,680 single-core.

Under sustained load, the CPU reached a dangerous 102.5°C, causing severe throttling and even forcing the system into sleep mode. The exterior case temperature reached 56°C, prompting the reviewer to comment, “I was very surprised to almost burn myself touching it.” The review concludes that while the K4 performs well for short bursts and gaming sessions, the cooling system struggles with sustained heavy loads.

TechRadar’s Professional Assessment

TechRadar’s review of the K4 (AMD Ryzen 9 7940HS, Radeon 780M) puts it through real-world work including 4K video editing in Premiere Pro. The reviewer most appreciated the understated styling, calling the design “a refreshing departure from the typical gamer-centric aesthetics” that suits creative workspaces, and noted the standard 1TB storage can feel limiting for heavy video and creative work. While the review echoes the thermal concerns, its overall verdict is positive: the K4 is “an excellent choice … if you’re seeking a balance of power, portability, and design.”

Fast in short bursts, throttled at 102.5°C on long loads

The Ryzen 9 7940HS and Radeon 780M cover 1080p gaming, content creation, and multitasking, and the 64GB memory ceiling with a 2TB drive leaves room to grow into. For short bursts of work the K4 posts desktop-class numbers, including that Cinebench R23 multi-core result of 13,037.

On long renders and other sustained loads, TechTablets measured the CPU at 102.5°C and the case at 56°C. HDMI 2.0 caps what the two video outputs can drive, and the USB-C port carries no Power Delivery. Starry Hope’s Mini PC Comparison Chart sets these specs beside other models.