Bit-Brick has released two single-board computers that share nearly identical hardware but take very different approaches under the hood. The Bit-Brick K1 and Bit-Brick K1 Pro both measure 90 x 80 mm (3.54 x 3.15 inches) and pack 4GB or 8GB of LPDDR4x RAM, Gigabit Ethernet, USB 3.0 and USB 2.0 ports, two M.2 M-Key slots for NVMe SSDs, an M.2 E-Key slot, a 40-pin GPIO header, HDMI, MIPI-DSI, MIPI-CSI, a microSD slot, and a 3.5mm audio jack into the same form factor.
The key difference is the processor. The K1 uses a SpacemiT K1 chip with eight RISC-V X60 cores delivering performance comparable to Arm Cortex-A55, Imagination BXE-2-32 graphics, and a 2 TOPS NPU. Software support is limited to the Chinese market, with OpenHarmony and an Ubuntu-based distribution called Bianbu Desktop as the primary options. The K1 Pro, by contrast, runs a Rockchip RK3576 with four Arm Cortex-A72 performance cores, four Cortex-A53 efficiency cores, Mali-G52 MC3 graphics, and a 6 TOPS NPU, with Debian and Android images available for download. The K1 Pro also supports optional 32GB or 64GB eMMC storage, letting it run without an SSD or microSD card.
For most users the K1 Pro is the more practical choice, offering broader software compatibility and stronger performance thanks to the mature Arm ecosystem. The RK3576 SoC has been gaining meaningful traction in the Linux community as well, with initial mainline kernel support beginning to land in Linux 6.12 and Collabora actively driving further upstream work on the platform, meaning the gap between vendor kernels and mainline is narrowing for tinkerers who prefer to build their own images. The official documentation also covers U-Boot and kernel customization for those who want to go deeper than the provided Debian image. The RISC-V-based K1 is better suited for developers who want to build or test software on the architecture. Both boards are currently available at nearly the same price point, with the K1 starting at $163 (€150) and the K1 Pro at $165 (€152).
