Quote Originally Posted by ownage View Post
Corsair mounted the DDC upside down in the Nautilus 500

I think the concern with mounting it upside down is that you can't prime it and air can get trapped in the pump impeller area and you will screw the pump since it requires liquid for lubrication (or something like that). I imagine that if you properly prime and bleed your loop with the pump upright first, you could then mount the pump upside down. Perhaps this is what Corsair did.