In a bowl, combine chopped pecans, 1/4 cup shredded cheese, 1/4 cup bacon bits, and 2 Tbsp green onions. Cover and set aside until ready to coat.
In a separate large bowl, add softened cream cheese, sour cream, the remaining bacon, shredded cheese, green onions, and Ranch powder.
With a spoon or spatula, mix until everything is well combined.
Lay out plastic wrap on the counter and then scoop the cream cheese mixture into the center of the plastic wrap. Bring together the corners, wrap and seal the cheese, shaping in a round ball.
Refrigerate in the plastic wrap for 2-3 hours, or until firm.
Once the cheeseball is firm, carefully unwrap the ball from the plastic and drop into the topping mixture. Gently roll the cheeseball to coat the ball in the mixture.
Transfer to a serving dish or board and serve with crackers.