How much can Core Ultra 5 245HX's performance change between power modes, and when should performance mode be used?

  The benefit of performance mode follows this laptop's sustained CPU power, GPU TGP, fan policy, and thermal limit — rated power doesn't convert into a fixed percentage.

  Use performance mode plugged in for games, builds, or renders; balanced or battery mode for office work, meetings, and mobility. If power is still cut quickly, a better-cooled chassis is the fix, not another preset.