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Beelink Mini S12 Pro (N100 16GB + 500GB) vs GMKtec NucBox G3 Pro (16GB + 512GB)

Full Mini PCs comparison in 2026

Updated October 2026
Data from the official Beelink and GMKtec sites.
2026 verdict
Between the Beelink Mini S12 Pro (N100 16GB + 500GB) and the GMKtec NucBox G3 Pro (16GB + 512GB), the cheaper, better-rated mini PC of this budget pair is the Beelink Mini S12 Pro, which also carries the longer three-year warranty.
Beelink Mini S12 Pro (N100 16GB + 500GB)
Winner
Beelink Mini S12 Pro (N100 16GB + 500GB)
$339.00
Buy on Amazon USA
The GMKtec NucBox G3 Pro answers with dual-channel memory that can be upgraded to 64GB, a second free M.2 slot and slightly more storage out of the box. Both are efficiency-class boxes built for office work, browsing and light server duty rather than heavy computing. Choose the Beelink Mini S12 Pro for the lower price and longer coverage, and the GMKtec NucBox G3 Pro if upgradeable memory and a spare drive bay matter more to you.
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FeatureBeelink Mini S12 Pro (N100 16GB + 500GB)GMKtec NucBox G3 Pro (16GB + 512GB)Winner
Price$339.00$309.99GMKtec NucBox G3 Pro (16GB + 512GB)
Rating4.54.4Beelink Mini S12 Pro (N100 16GB + 500GB)
Warranty3 years1 yearBeelink Mini S12 Pro (N100 16GB + 500GB)
Storage Capacity500 GB512 GBGMKtec NucBox G3 Pro (16GB + 512GB)
CPU ModelIntel N100Intel Core i3-10110UDifferent strengths
Memory ConfigurationSingle-channelDual-channelDifferent strengths
GPU ModelIntel UHD GraphicsIntel UHD Graphics (up to 1000 MHz)Different strengths
Memory TypeDDR4DDR4Tie
Memory Capacity16 GB16 GBTie

What the differences mean

Memory upgradeability

The GMKtec NucBox G3 Pro ships dual-channel DDR4 at 2666 MHz and takes up to 64GB across two SO-DIMM slots. The Beelink Mini S12 Pro runs single-channel DDR4 capped at 16GB, which is also the maximum this configuration supports, so there is no growth path.

Storage expansion

The GMKtec NucBox G3 Pro has a free M.2 2242 SATA slot next to its 512GB drive, so a second drive slots in without replacing the first. The Beelink Mini S12 Pro has a single M.2 slot, so more storage means swapping the 500GB drive already installed.

Warranty length

The Beelink Mini S12 Pro carries a three-year warranty against one year on the GMKtec NucBox G3 Pro, which matters most to a buyer planning to leave either box running unattended for years.

Ports for security and mounting

The GMKtec NucBox G3 Pro adds a Kensington lock slot and includes a VESA mount in the box. The Beelink Mini S12 Pro has neither, so mounting it behind a monitor needs a separate bracket.

Which one to buy if

  • you want the lower price and the longer warranty
    Beelink Mini S12 Pro (N100 16GB + 500GB)

    The Beelink Mini S12 Pro costs less and is backed by three years of coverage against the GMKtec NucBox G3 Pro's one.

  • you expect to add more memory or a second drive later
    GMKtec NucBox G3 Pro (16GB + 512GB)

    The GMKtec NucBox G3 Pro's dual-channel memory reaches 64GB and its free M.2 slot takes a second SSD, neither of which the Beelink Mini S12 Pro offers.

  • the box needs to mount behind a monitor with a lock slot
    GMKtec NucBox G3 Pro (16GB + 512GB)

    The GMKtec NucBox G3 Pro includes a VESA mount and a Kensington lock slot in the box.

  • you want the quietest of the two at idle
    Beelink Mini S12 Pro (N100 16GB + 500GB)

    The Beelink Mini S12 Pro's N100 runs at a lower power envelope than the GMKtec NucBox G3 Pro's i3-10110U, whose fan owners describe as audible under load.

What owners say

GMKtec NucBox G3 Pro (16GB + 512GB) owners lead with how easy setup is, tiny and ready to work within minutes on Windows 11 Pro with no trial software, and how upgradeable it is for the price: the memory is not soldered, ships as two modules in dual-channel, and the tool-free lid opens onto a second M.2 slot for more storage. The port selection also gets credit, four USB-A ports and two HDMI outputs for a dual-monitor desk. The most repeated complaint is the total absence of USB-C, DisplayPort or Thunderbolt, and the fan is rated moderate to loud under sustained load even though the spec sheet quotes a figure below 38dB. A handful of owners also report early faults, from a unit that never displayed an image to a faulty internal Bluetooth radio.

Frequently Asked Questions

Which is better overall: Beelink Mini S12 Pro (N100 16GB + 500GB) or GMKtec NucBox G3 Pro (16GB + 512GB)?

The Beelink Mini S12 Pro wins on price, owner rating and its three-year warranty. The GMKtec NucBox G3 Pro answers with upgradeable dual-channel memory, a free M.2 slot and slightly more storage.

Can the memory be upgraded on either mini PC?

Only on the GMKtec NucBox G3 Pro, whose two SO-DIMM slots take up to 64GB. The Beelink Mini S12 Pro ships with 16GB, which is also the ceiling this configuration supports.

Which one has room for a second SSD?

The GMKtec NucBox G3 Pro, which has a free M.2 2242 SATA slot alongside its 512GB drive. The Beelink Mini S12 Pro has a single M.2 slot already occupied by its 500GB drive.

Do either of these mini PCs have USB-C?

No. Neither the Beelink Mini S12 Pro nor the GMKtec NucBox G3 Pro has a USB-C, USB4, Thunderbolt or DisplayPort connector; both rely on USB-A ports and HDMI for video.

Who should buy the Beelink Mini S12 Pro?

Buyers who want the lower price, the longer three-year warranty and a quiet always-on box for media, browsing or light server duty.

Who should buy the GMKtec NucBox G3 Pro?

Buyers who want upgradeable dual-channel memory, a spare M.2 slot for more storage, and extras like a VESA mount and a Kensington lock slot in the box.

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