In a medium skillet or Instant Pot, brown sausage and drain fat.
Add cream cheese, Velveeta, and Rotel to skillet. Cook on low until cheese has melted. Stir in sour cream. Add pepper to taste.
Set Instant Pot to Warm and serve with tortilla chips. Stir mixture every so often to make sure it is not burning on bottom.
This can also be made in a crock pot.