Elegant Raspberry White Chocolate Swirl Cheesecake

Preheat the oven to 325°F (160°C).
In a medium bowl, combine graham cracker crumbs, 1/4 cup sugar, and melted butter. Press the mixture into the bottom of a 9-inch springform pan.
In a large bowl, beat the cream cheese, 1 cup sugar, and vanilla until smooth. Add eggs one at a time, beating well after each addition. Stir in the sour cream.
Pour half of the cream cheese mixture over the crust. Drizzle with half of the melted white chocolate and half of the raspberry preserves. Swirl with a knife to create a marbled effect.