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Mini PCs · Head to head

Asus Chromebox 5a (Celeron 4GB + 128GB) vs GMKtec NucBox M6 Ultra (32GB + 1TB)

Full Mini PCs comparison in 2026

Updated September 2026
Data from Amazon and official Asus and GMKtec sites.
2026 verdict
GMKtec NucBox M6 Ultra (32GB + 1TB)
Winner
GMKtec NucBox M6 Ultra (32GB + 1TB)
$629.99$799.9921% OFF
Buy on Amazon USACheck price
Different operating systems, different jobs in this mini PC pairing, and on raw specification GMKtec NucBox M6 Ultra (32GB + 1TB) wins by a wide margin: eight times the memory at 32GB against 4GB, and roughly eight times the storage at 1TB against 128GB, running Windows 11 Pro rather than ChromeOS. Asus Chromebox 5a (Celeron 4GB + 128GB) is not really trying to compete on those numbers, it is built for browser-based work, and it answers with a lower price, a slightly higher owner rating, seven USB ports and four display outputs including a micro SD reader, all aimed at classrooms, kiosks and managed fleets. Both include Wi-Fi 6E and both allow their memory and storage to be upgraded after purchase. Choose Asus Chromebox 5a (Celeron 4GB + 128GB) for a low-maintenance ChromeOS box built for browser work; choose GMKtec NucBox M6 Ultra (32GB + 1TB) for a full Windows desktop with real memory and storage headroom.
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FeatureAsus Chromebox 5a (Celeron 4GB + 128GB)GMKtec NucBox M6 Ultra (32GB + 1TB)Winner
Price$359.00$629.99Asus Chromebox 5a (Celeron 4GB + 128GB)
Rating4.54.2Asus Chromebox 5a (Celeron 4GB + 128GB)
Memory TypeDDR4DDR5GMKtec NucBox M6 Ultra (32GB + 1TB)
Memory Speed3200 MT/s4800 MT/sGMKtec NucBox M6 Ultra (32GB + 1TB)
Memory Capacity4 GB32 GBGMKtec NucBox M6 Ultra (32GB + 1TB)
Storage Capacity128 GB1 TBGMKtec NucBox M6 Ultra (32GB + 1TB)
CPU ModelIntel Celeron 7305AMD Ryzen 5 7640HSDifferent strengths
Memory ConfigurationSingle-channelDual-channelDifferent strengths
GPU ModelIntel UHD GraphicsAMD Radeon 760MDifferent strengths

Frequently Asked Questions

Which is better overall: Asus Chromebox 5a (Celeron 4GB + 128GB) or GMKtec NucBox M6 Ultra (32GB + 1TB)?

GMKtec NucBox M6 Ultra (32GB + 1TB), on raw memory, storage and processing power. Asus Chromebox 5a (Celeron 4GB + 128GB) wins on price and owner rating, and serves a different purpose as a browser-based ChromeOS machine.

What is the biggest difference between them?

Operating system and scale. Asus Chromebox 5a (Celeron 4GB + 128GB) runs ChromeOS with 4GB of memory for browser-based work, while GMKtec NucBox M6 Ultra (32GB + 1TB) runs Windows 11 Pro with 32GB of memory for full desktop workloads.

Which one has more USB ports?

Asus Chromebox 5a (Celeron 4GB + 128GB), with seven USB ports in total. GMKtec NucBox M6 Ultra (32GB + 1TB) has five USB ports including one USB4.

Can either be upgraded?

Yes, both. Asus Chromebox 5a (Celeron 4GB + 128GB) takes DDR4 SODIMM memory up to 16GB and a larger NVMe drive up to 512GB. GMKtec NucBox M6 Ultra (32GB + 1TB) takes DDR5 up to 128GB and a second M.2 drive.

Who should buy the Asus Chromebox 5a (Celeron 4GB + 128GB)?

Buyers who need a low-maintenance ChromeOS machine for browser-based work, classrooms, kiosks, digital signage or managed fleets, rather than a full Windows desktop.

Who should buy the GMKtec NucBox M6 Ultra (32GB + 1TB)?

Buyers who need a full Windows desktop with real memory and storage for general computing, multitasking or home lab use, rather than a browser-only machine.

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