What it changes
- It gives comma four a supported external-GPU path.
- It runs the larger Chestnut driving model on the external GPU.
- It gives comma room to develop larger driving models.
What is the comma GPU?
It is a desktop graphics card that connects to comma four through Chestnut. It runs a much larger openpilot driving model.
Chestnut is the connection. RX 9060 is the GPU.
comma four normally runs its driving model on a Snapdragon 845 MAX. Chestnut lets it send model work to an external AMD Radeon RX 9060 8GB. The card has faster dedicated memory and much more graphics compute, so it can run a model that is too large for the mobile processor.
RX 9060desktop GPU8GB, non-XT card
288 GB/sGPU bandwidthinside the graphics card
GPU modeldriving workloadon the external graphics card
Optionalnormal usecomma four works without it
What stays the same
Your car must already be supported. openpilot still controls only the functions that the car and software support. You must supervise every drive. A larger model does not make the system autonomous.
Why call it an eGPU?
eGPU means external graphics processing unit. The RX 9060 sits outside comma four. A USB cable and the Chestnut hardware connect it to the device. The 288 GB/s number is the speed of memory inside the card. It is not the USB cable speed, and it does not mean driving becomes 9.6 times better.
Read comma's announcementWhat changed in openpilot 0.11.2?
The update combines a larger driving network with improved training. Its 4-billion-parameter world model is part of that training system, rather than the network that drives your car.
Read the model update and technical deep divecomma GPU questions
Does comma four have a GPU?
comma four has a mobile graphics processor in its Snapdragon 845 MAX. Chestnut adds a separate desktop Radeon RX 9060 for much larger driving models.
Photos: comma.ai. CommaGuide is an independent guide and is not affiliated with comma.ai.
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