Mix pecans, cookies and butter together; press into the bottom and up the sides of a greased 9" springform pan. Drizzle with chocolate; chill until chocolate is firm.
Pour filling into crust; bake at 300° for one hour and 10 minutes. Cool completely. Cover and chill 8 hours. Spread topping over cake. Remove sides of pan.
Filling: Combine all ingredients; blend until smooth.
Topping: Heat whipping cream and sugar over low heat, whisking constantly. Add chocolate chips, whisking until smooth.
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