You can use a 120 or 240 AIO, no problem. But if you want to use a 360, you will only be able to place it on the top. There isn't enough space on the side.

Also realize that the 4 argb fans that are provided use a proprietary connector to connect to an argb controller (the controller uses a standard 3 pins connector for argb and sata power connector for power).

I also removed the hard drive holder - no one needs it anyway, I had more space for cables.

You can install a 360mm Aio at the top that fits in without any problems. But you should be aware. That there is not too much space on the back for cables.