Mini PCs · Head to head

GMKtec NucBox G3 Pro (16GB + 512GB) vs GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)

Full Mini PCs comparison in 2026

Updated October 2026
Data from Amazon and official GMKtec site.
2026 verdict
An eight-core Lunar Lake chip against a two-core budget part is the whole story: the GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB) is the better mini PC here over the GMKtec NucBox G3 Pro (16GB + 512GB).
GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)
Winner
GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)
$589.99
Buy on Amazon USA
The GMKtec NucBox K13 runs an Intel Core Ultra 7 256V with Arc 140V graphics and a 47 TOPS NPU on 16GB of LPDDR5X-8533, and it adds dual USB4 ports, 5 Gigabit Ethernet and Wi-Fi 6E. The GMKtec NucBox G3 Pro is an office box on an Intel Core i3-10110U with Intel UHD graphics, DDR4 in two SO-DIMM slots that reach 64GB, a second M.2 slot, 2.5 Gigabit Ethernet and the more affordable tag of the pair, but it has no USB-C at all and its memory tops out where the K13 starts. Choose the GMKtec NucBox K13 for current hardware, USB4 and fast networking, and the GMKtec NucBox G3 Pro for a cheap, expandable Windows desktop or a home server.
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FeatureGMKtec NucBox G3 Pro (16GB + 512GB)GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)Winner
Price$309.99$589.99GMKtec NucBox G3 Pro (16GB + 512GB)
Rating4.44.7GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)
Memory TypeDDR4LPDDR5XGMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)
Memory Speed2666 MHz8533 MT/sGMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)
CPU ModelIntel Core i3-10110UIntel Core Ultra 7 256VDifferent strengths
Memory ConfigurationDual-channelSoldered (non-upgradeable)Different strengths
GPU ModelIntel UHD Graphics (up to 1000 MHz)Intel Arc 140VDifferent strengths
Warranty1 year1 yearTie
Memory Capacity16 GB16 GBTie
Storage Capacity512 GB512 GBTie

What the differences mean

Processor

The GMKtec NucBox K13 runs an Intel Core Ultra 7 256V with eight cores on the Lunar Lake platform, against the Intel Core i3-10110U in the GMKtec NucBox G3 Pro. The K13 is built for current software and light creative work, while the G3 Pro is sized for documents, browsing and streaming.

Memory

Both ship 16GB, but they are different kinds. The GMKtec NucBox K13 uses LPDDR5X-8533 soldered to the board, so it is fast and fixed. The GMKtec NucBox G3 Pro uses DDR4-2666 in two SO-DIMM slots that reach 64GB, so it is slower but the one you can upgrade later.

Graphics and AI

The GMKtec NucBox K13 adds Intel Arc 140V graphics and a 47 TOPS NPU for on-device AI, which the GMKtec NucBox G3 Pro lacks entirely: its Intel UHD graphics are enough for display and video, and it has no NPU.

Ports and video

The GMKtec NucBox K13 has two USB4 Type-C ports, one HDMI 2.1 output and a 3.5mm jack, and can drive several screens through its USB4 ports. The GMKtec NucBox G3 Pro has four USB-A ports and two HDMI 1.4 outputs but no USB-C, and dual 4K runs at a low refresh rate.

Networking

The GMKtec NucBox K13 connects over 5 Gigabit Ethernet, Wi-Fi 6E and Bluetooth 5.2. The GMKtec NucBox G3 Pro uses 2.5 Gigabit Ethernet, Wi-Fi 6 and Bluetooth 5.2, slower on the wire but still more than enough for a home network.

Storage

Both ship a 512GB drive with a second M.2 slot free. The GMKtec NucBox K13 uses PCIe 4.0 slots, while the GMKtec NucBox G3 Pro pairs a PCIe 3.0 slot with an M.2 2242 SATA slot.

Which one to buy if

What owners say

Owners of the GMKtec NucBox G3 Pro (16GB + 512GB) describe a tiny box that is ready to work minutes after unboxing, Windows 11 Pro already installed and free of trial software. What they praise most is how upgradeable it is for the money: the 16GB of DDR4 arrives as two matched modules running dual-channel, the lid lifts without tools, and a free M.2 slot takes a second drive. Four USB-A ports, two HDMI outputs and the 2.5 Gigabit LAN port get steady mention, and several report months of stable daily use. Their complaints are the complete lack of USB-C, HDMI 1.4 holding dual 4K to a low refresh rate, a fan that becomes audible under load, thin documentation and a few reports of early failures.

Frequently Asked Questions

Which is better overall: GMKtec NucBox G3 Pro (16GB + 512GB) or GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)?

The GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB) is the better mini PC, with a newer Intel Core Ultra 7 processor, Arc 140V graphics, a 47 TOPS NPU, dual USB4 and 5 Gigabit Ethernet. The GMKtec NucBox G3 Pro (16GB + 512GB) wins on price and on upgradeable memory that reaches 64GB.

What is the biggest difference between the GMKtec NucBox G3 Pro (16GB + 512GB) and the GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)?

The processor and the memory. The GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB) uses an eight-core Intel Core Ultra 7 256V with fast LPDDR5X-8533 soldered on the board, while the GMKtec NucBox G3 Pro (16GB + 512GB) uses a two-core Intel Core i3-10110U with slower DDR4 in upgradeable slots.

Can the memory be upgraded on the GMKtec NucBox G3 Pro (16GB + 512GB) or the GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)?

Only the GMKtec NucBox G3 Pro (16GB + 512GB) is upgradeable: its two DDR4 SO-DIMM slots take up to 64GB. The GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB) has 16GB of LPDDR5X soldered, so its memory is fixed.

Do either of these mini PCs have USB4 or USB-C?

The GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB) has two USB4 Type-C ports carrying data, display and 100W power delivery. The GMKtec NucBox G3 Pro (16GB + 512GB) has no USB-C at all, only four USB-A ports.

Who should buy the GMKtec NucBox G3 Pro (16GB + 512GB)?

Buyers who want a cheap, expandable Windows 11 Pro desktop for office work, streaming, a kids' PC or a small Home Assistant server, and who value being able to add memory and a second drive.

Who should buy the GMKtec NucBox K13 (Ultra 7 256V 16GB + 512GB)?

Anyone who wants a compact Windows 11 Pro desktop with a current Intel Core Ultra processor, USB4, 5 Gigabit Ethernet, multi-display output and a 47 TOPS NPU for on-device AI.

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