PREHEAT oven to 325°F if using a silver 9-inch springform pan (or to 300°F if using a dark nonstick 9-inch springform pan). Mix ginger snap crumbs, pecans and butter; press onto bottom and 1 inch up side of pan.

BEAT cream cheese, 3/4 cup of the sugar and the vanilla with electric mixer until well blended. Add eggs, one at a time, mixing on low speed after each addition just until blended. Remove 1-1/2 cups of the batter; place in small bowl. Stir remaining 1/4 cup sugar, the pumpkin and spices into remaining batter. Spoon half of the pumpkin batter into crust; top with spoonfuls of half of the reserved plain batter. Repeat layers. Cut through batters with knife several times for marble effect.

BAKE 55 min. to 1 hour 5 min. or until center is almost set. (Test doneness by gently shaking the pan. If the cheesecake is done, it will be set except for an approximately 2-1/2-inch area in the center that will be soft and jiggly.) Run knife or metal spatula around rim of pan to loosen cake; cool before removing rim. Refrigerate at least 4 hours before serving. Store leftovers in refrigerator.