Preheat the oven to 350°F (175°C) and grease a 9x13 inch baking dish.
In a medium mixing bowl, whisk together the light corn syrup, eggs, granulated sugar, melted butter, vanilla extract, and salt until homogenous.
Fold the chopped pecans into the liquid mixture.
Pour the pecan mixture into the prepared baking dish, spreading it evenly across the bottom.
Sprinkle the dry yellow cake mix evenly over the top of the pecan layer.
Distribute the butter pats across the entire surface of the cake mix to ensure even hydration during baking.
Bake for 45 minutes until the crust is golden brown and the filling is bubbling at the edges.
Allow the cake to cool for 20 minutes to let the pecan filling set before serving.