i dont have one yet i was gonna get one probably the founders edition the case is 65 mm to mother board i think the cooler is like 69 mm thickAll dimensions are usually given, but pcpartpicker.com helps a lot. What RTX 3080 do you have exactly?
Edit: If you check the Phanteks website, it shows that it supports up to 420mm radiators at the top but only fits 240mm radiators in the front: https://www.phanteks.com/Enthoo-Pro.html