George Hotz founder of comma.ai released the chestnut external GPU expansion dock on August 12. The standalone dock costs $249 while the kit including an AMD Radeon RX 9060 8GB is priced at $799. Hotz gained fame by cracking the iPhone and PS3 at age 17 and founded comma.ai in 2016 to develop affordable open-source hardware for semi-autonomous driving assistance. The dock raises the external eGPU power consumption limit to 100W, boosting computing power for comma four to near Tesla HW4 levels. The upcoming openpilot 0.11.2 will include a 1B parameter driving model, the largest of comma.ai, offering 30 times more parameters and 100 times greater floating-point computing power than comma four models. The company reports its vehicle fleet generates nearly 1 million minutes of driving data daily, with 15% used for training. The dock uses a PCIe Gen4 x4 to USB4 bridge with C language control chip firmware open sourced on GitHub by tinygrad, providing a low-barrier path for large models in affordable intelligent driving systems.