Mini PCs · Head to head

GMKtec K17 Plus (32GB + 1TB) vs GMKtec NucBox M7 Ultra (32GB + 512GB)

Full Mini PCs comparison in 2026

Updated October 2026
Data from Amazon and official GMKtec site.
2026 verdict
One is a current-generation machine in a sealed case, the other an upgradeable older platform, and the GMKtec K17 Plus (32GB + 1TB) is the faster of the two.
GMKtec K17 Plus (32GB + 1TB)
Winner
GMKtec K17 Plus (32GB + 1TB)
$1099.99$1299.9915% OFFPrime exclusive deal
Buy on Amazon USA
It wins on rating, memory type, memory speed and storage, pairing fast soldered LPDDR5X with a 1TB drive, an Intel Core Ultra 7 258V, Arc 140V graphics and a 47 TOPS NPU. The GMKtec NucBox M7 Ultra (32GB + 512GB) keeps the lower price and the greater flexibility: SODIMM memory to 64GB, two M.2 slots, dual 2.5G Ethernet and, uniquely here, a front OCuLink port for an external GPU. Both ship Windows 11 Pro with a one-year warranty. Choose the K17 Plus for newer silicon and AI acceleration, the M7 Ultra for expandability and networking.
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FeatureGMKtec K17 Plus (32GB + 1TB)GMKtec NucBox M7 Ultra (32GB + 512GB)Winner
Price$1099.99$559.99GMKtec NucBox M7 Ultra (32GB + 512GB)
Rating4.74.4GMKtec K17 Plus (32GB + 1TB)
Memory TypeLPDDR5XDDR5GMKtec K17 Plus (32GB + 1TB)
Memory Speed8533 MT/s4800 MT/sGMKtec K17 Plus (32GB + 1TB)
Storage Capacity1 TB512 GBGMKtec K17 Plus (32GB + 1TB)
CPU ModelIntel Core Ultra 7 258VAMD Ryzen 7 PRO 6850UDifferent strengths
Memory ConfigurationSoldered (non-upgradeable)Dual-channelDifferent strengths
GPU ModelIntel Arc 140VAMD Radeon 680M (12 cores, 2200 MHz)Different strengths
Warranty1 year1 yearTie
Memory Capacity32 GB32 GBTie

What the differences mean

Processor and AI

The GMKtec K17 Plus (32GB + 1TB) uses an Intel Core Ultra 7 258V with Arc 140V graphics and a 47 TOPS NPU, while the GMKtec NucBox M7 Ultra (32GB + 512GB) runs an older Ryzen 7 PRO 6850U with Radeon 680M and no NPU. AI acceleration is the K17 Plus's clear advantage.

Memory speed against upgradability

The K17 Plus ships soldered LPDDR5X at 8533 MT/s, which is fast but fixed at 32GB; the M7 Ultra uses DDR5-4800 SODIMM modules that reach 64GB. One is quicker today, the other can grow.

Expandability

The M7 Ultra adds a front OCuLink port for a PCIe-linked external GPU, two M.2 2280 Gen 4 slots and dual 2.5G Ethernet; the K17 Plus has a single USB4 port, two M.2 slots and one 2.5G port. A GPU dock or a second network link is M7 Ultra territory.

Storage

The GMKtec K17 Plus (32GB + 1TB) boots from a 1TB Gen 5-capable drive against the M7 Ultra's 512GB, and both accept a second M.2 drive. For a large local library, the K17 Plus starts with more.

Wireless and displays

Both have Wi-Fi 6E and Bluetooth 5.2, but the GMKtec K17 Plus (32GB + 1TB) offers two HDMI 2.1 outputs against the M7 Ultra's HDMI 2.1 plus DisplayPort 2.0. The M7 Ultra feeds four displays, the K17 Plus three.

Which one to buy if

What owners say

Owners of the GMKtec NucBox M7 Ultra (32GB + 512GB) keep returning to how quiet it is: the dual-fan cooling lets them call it silent while multitasking, and several pair the words quiet and fast. The front OCuLink port draws the second wave of praise, described as an upgrade path that avoids replacing the whole machine when interests turn to GPU work. Expandability is the third theme, with owners opening the tool-less top cover to drop in a second drive. Two owners hit a Windows activation snag on first boot that support fixed quickly, one unit failed within two months, and a few found the graphics unsuitable for PC-tethered VR.

Frequently Asked Questions

Which is better overall: GMKtec K17 Plus (32GB + 1TB) or GMKtec NucBox M7 Ultra (32GB + 512GB)?

The GMKtec K17 Plus (32GB + 1TB), for its newer Core Ultra 7 258V, Arc 140V graphics, 47 TOPS NPU, faster memory and larger drive. The GMKtec NucBox M7 Ultra (32GB + 512GB) wins on price and flexibility.

What is the biggest difference between the GMKtec K17 Plus (32GB + 1TB) and the GMKtec NucBox M7 Ultra (32GB + 512GB)?

Generation against expandability. The GMKtec K17 Plus (32GB + 1TB) is a newer, sealed, AI-capable machine, while the GMKtec NucBox M7 Ultra (32GB + 512GB) is an older platform with OCuLink, dual Ethernet and upgradable memory and storage.

Can you upgrade the memory on the GMKtec K17 Plus (32GB + 1TB) or the GMKtec NucBox M7 Ultra (32GB + 512GB)?

Only on the GMKtec NucBox M7 Ultra (32GB + 512GB), which uses DDR5 SODIMM slots up to 64GB. The GMKtec K17 Plus (32GB + 1TB) has its 32GB of LPDDR5X soldered and fixed.

Which of these mini PCs supports an external GPU?

The GMKtec NucBox M7 Ultra (32GB + 512GB), through its front OCuLink port, which gives an eGPU dock a PCIe link. The GMKtec K17 Plus (32GB + 1TB) can only use its USB4 port for a dock.

Who should buy the GMKtec K17 Plus (32GB + 1TB)?

Buyers who want current Intel silicon, on-device AI acceleration, faster memory and a 1TB drive in a compact VESA-mountable box.

Who should buy the GMKtec NucBox M7 Ultra (32GB + 512GB)?

Buyers who want to grow a machine over time, with upgradable memory, a second drive, dual 2.5G Ethernet and an OCuLink path to an external GPU.

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