You can Install up to 6 SSD´s on the back or 3 HDD´s , I plan on installing 1 SSD and 2 HDD´s there. I think I will be fine with installing the Radiator on the side and then have the fans on the top for airflow. Thanks for the answer, I just wanted to check, not that its a really bad choice and it cuts the lifespan of most Hard Drives in half.