Can a laptop cool Core Ultra 5 135U, and will it throttle under sustained load?

  Long-run behavior is set by sustained package power, shared heat pipes, and fan policy. Balanced mode for short office work; for encodes or renders, choose two fans, a thicker chassis, and plugged-in performance mode. With a dGPU, check the combined CPU/GPU budget too. Rated power can't produce a temperature, and "no throttling" can't be inferred from the model — a full-load test of the actual laptop is more honest.