Mix the graham cracker crumbs, sugar, and melted butter until well combined. Press firmly with the back of a spoon into the bottom and sides of a pie dish.
In a large bowl, add the cream cheese and powdered sugar. Starting on low speed, gradually beat the mixture until smooth.
Add the peanut butter, heavy cream, and vanilla extract. Beat until smooth, scraping the bowl once to incorporate everything.
Spoon the mixture into the pie crust. Top with chopped peanuts, then chill in the fridge for at least 4 hours.