Tesla HW3 Computers Overheat on FSD v14 Lite
Following the public rollout of Full Self-Driving v14 Lite, numerous Tesla owners with HW3 hardware report overheating of their Autopilot computers. HW3, possessing only 15% of the memory bandwidth of HW4, is forced to work harder with the compressed FSD v14 Lite model, generating temperatures exceeding 90°C and triggering thermal faults. This disables features like the 'Start Self-Driving' button and displays warnings on screen. In severe cases, sustained heat has damaged circuit boards, requiring costly replacements. The liquid cooling design, with HW3 positioned farthest from the radiator,
- HW3 has only 15% of HW4's memory bandwidth
- HW3 temperatures exceed 90°C causing thermal faults
- 'Start Self-Driving' button disables due to overheating
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