advanced usb30 ports for maximum data transfer speed acrylic transparent side cover design support for longer high end graphics cards up to 310mm screw less mechanisms on 525quotdevices 25quothddssd trays x 3 35quothdd trays x 3 easy clean detachable air filters on the front amp bottom cover 7 pci vented slots provide flexibility and ventilation performance for multiple graphics cards solutions cable feedthrough on the mb tray for easy routing and hiding cables holes