You don't need to unscrew the mobo.  The oem dell backplate for the air cooler is compatible with the H60 AIO.
Hello guys, My Aurora R7 has a box air cooler and PC is definitely too loud I would like to change this cooler to Corsair H60. Therefore I have question about it. I read here that some Aurora have factory AiO. In this case the replacement with the H60 is without any problems. But what about replacing the air cooler with an AIO? Do I have to unscrew the motherboard?[URL]
Aurora R7 + Corsair H60