At 5.2GHz the 255HX sits a step under the 265HX, does AI feel the missing 0.1GHz?

  The AI experience does not feel the missing clock. The 255HX keeps 20 cores, VNNI for short INT8 runs and an NPU quoted near 33 TOPS, and the 0.1GHz gap to the 265HX only shows under sustained full load, a regime where the laptop chassis gives out before the frequency does.

  A tightened HX budget loses nothing real here, and money saved is better spent on a chassis with stronger sustained cooling. Local inference speed tracks memory bandwidth and model size far more than turbo clocks, so check the machine's measured plugged-in power delivery instead of its rated megahertz. The numbers that matter appear in reviews, not on the box.