Darin off any excess liquid from spinach and chilies.
Combine everything in crock pot and allow to heat through (about 40 minutes).
Combine the cheeses, butter and sour cream in a pot over medium heat until melted and combined.
While the cheese is melting drain and chop the artichokes and drain any excess liquid off of the spinach.
Stir the spinach, artichokes, chilies, and garlic into the cheese.