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H3C MegaCube: New mini-PC launches promising high performance with 10 Gbps Ethernet and 128 GB LPDDR5X RAM

The H3C MegaCube comes in a fetching colourway. (Image source: H3C)
The H3C MegaCube comes in a fetching colourway. (Image source: H3C)
The H3C MegaCube is a stylish mini-PC that measures just 150 × 150 × 50.5 mm. Nonetheless, the device should deliver a punch thanks to its Nvidia GB10 chipset and 128 GB of LPDDR5X RAM. The MegaCube has a high starting price to match, though.

A few months ago, H3C introduced the MegaBook as a Microsoft Surface Pro rival with a 120 Hz OLED display. Now, the company has entered the world of compact AI-focused mini-PCs with the MegaCube, which it is already selling in China. Built around Nvidia's latest Grace Blackwell architecture, the MegaCube resembles the DGX Spark (curr. $3,999 on Amazon) upon which it is ultimately based.

To that end, the MegaCube combines ten ARM Cortex-X925 and ten Cortex-A725 ARM CPU cores with a Blackwell-based GPU delivering 6,144 CUDA cores. As a result, H3C rates the mini-PC as offering up to 1 petaflop of Tensor core performance (FP4). Please note that these are theoretical performance numbers. Also, this GB10 chipset can also be obtained in other mini-PCs like the MSI EdgeXpert AI.

Setting that aside, H3C allows two MegaCube units to be paired together. Despite only spanning 150 × 150 × 50.5 mm, each MegaCube features 128 GB of LPDDR5x RAM, 10 Gbps Ethernet and WiFi 7, as well as USB Type-C and HDMI 2.1a among other ports. The MegaCube ships with Nvidia's Ubuntu-based DGX OS, too. Pricing is on the steep side though, with CNY 36,999 (~$5,240) currently being charged on JD.com. Please see H3C's website for more information.

(Image source: H3C)
(Image source: H3C)

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2025 12 > H3C MegaCube: New mini-PC launches promising high performance with 10 Gbps Ethernet and 128 GB LPDDR5X RAM
Alex Alderson, 2025-12- 9 (Update: 2025-12- 9)