{"slug": "comma-ai-launches-a-pcie-gen4-x4-to-usb4-dock-with-open-source-firmware", "title": "Comma.ai Launches a PCIe Gen4 X4 to USB4 Dock with Open-Source Firmware", "summary": "Comma.ai launched chestnut, a PCIe Gen4 X4 to USB4 dock with open-source firmware, enabling GPU access over USB connections and macOS support via TinyGPU. The dock allows users to connect to a computer as a standard USB4 dock or use tinygrad for USB3/USB2 GPU access.", "body_md": "### With a PC\n\n#### USB4\n\nConnect chestnut to your computer and use it like any other USB4 dock.\n\n#### USB3 or USB2\n\nUse [tinygrad](https://github.com/tinygrad/tinygrad)\nto access the GPU over a USB3 or USB2 connection.\n\n#### Mac\n\nFollow the [TinyGPU setup guide](https://docs.tinygrad.org/tinygpu/)\nto use a supported GPU on macOS.\n\nJoin the #gpu-on-usb channel on the tinygrad [Discord](https://discord.gg/ZjZadyC7PK).", "url": "https://wpnews.pro/news/comma-ai-launches-a-pcie-gen4-x4-to-usb4-dock-with-open-source-firmware", "canonical_source": "https://comma.ai/shop/chestnut", "published_at": "2026-08-13 07:10:08+00:00", "updated_at": "2026-08-13 07:40:49.277269+00:00", "lang": "en", "topics": ["ai-infrastructure", "ai-tools", "developer-tools"], "entities": ["Comma.ai", "chestnut", "tinygrad", "TinyGPU", "Discord"], "alternates": {"html": "https://wpnews.pro/news/comma-ai-launches-a-pcie-gen4-x4-to-usb4-dock-with-open-source-firmware", "markdown": "https://wpnews.pro/news/comma-ai-launches-a-pcie-gen4-x4-to-usb4-dock-with-open-source-firmware.md", "text": "https://wpnews.pro/news/comma-ai-launches-a-pcie-gen4-x4-to-usb4-dock-with-open-source-firmware.txt", "jsonld": "https://wpnews.pro/news/comma-ai-launches-a-pcie-gen4-x4-to-usb4-dock-with-open-source-firmware.jsonld"}}