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?
On a modern laptop undervolting probably isn’t an option, but you can try to reduce your CPUs clock speeds.
My old thinkpad has a PL1 of like 100 watts normally, 50 watts in game, but it drops all the way down to just 25 watts after a while. If I can reduce my CPUs clock speeds so it rarely exceeds 35 watts in game then I can maintain that higher power level almost indefinitely. Maybe try seeing if your laptop is doing something similar?