i had the expirence on windows 8.1 and 10 that 8GB RAM was really hard going on the limit, useally 8GB should be enough for all stuff like people say. But i have figured out that some of the best advices is to run your memory in dual channel mode.

Maybe i could help, but i am not an expert, just my expirence

PS: I have this high memory useage also because of Maximum settings, so if you run lower settings it would made a difference.