Would this even give a significance preformance gain? allocating only P-Cores to games, and for games that make my laptop thermal throttle (it gets hot then very laggy until it cools), would the inverse (E-Cores) do anything? Mainly im looking to improve the performance of games, also how would i do this?
What the other guy said, the task scheduler already assigns processes to cores depending on what is suitable.
What you might look into, if you want to reduce thermal throttling, is undervolting. By reducing the voltage being used by your CPU, it’ll run cooler.
I almost always give undervolting a go on laptops. Saves battery, reduces temps, potentially even improves performance.