Line a 9x5 loaf pan with plastic wrap or parchment paper.
Chill the bowl and whisk attachment in the fridge or freezer for 10 minutes.
Whip cream in the chilled bowl until it thickens, then add sugar and cream of tartar. Continue whipping until stiff peaks form.
Set aside 2 cups of whipped cream and refrigerate the rest.
Hull and slice strawberries; set aside some for garnish.
Beat cream cheese, sugar, and vanilla until smooth. Fold in the 2 cups of whipped cream.
Layer strawberries, cream mixture, and graham crackers in the pan, repeating twice. Chill for 8 hours or overnight.
Invert the cake, frost with whipped cream, and decorate with sliced strawberries. Slice and serve!