Spacious Chassis: This huge 4U server case comes with 11 internal 3.5' HDD bays. It only supports HDD drives with three screw holes on each side, allowing for a secure, 3-point connection on each side. IT DOES NOT Support HDD drives with two screw holes on each side. Efficient Cooling: Pre-installed 2x120mm front and 2x80mm rear PWM fans for optimal airflow. Expandable Design: 7 PCI slots, supports ATX and CEB motherboards for future upgrades. High-Speed USB-C: Front panel features a USB-C 3.1 port for fast data transfer and modern connectivity. Additional Ports: Includes 2 USB 3.0 ports for versatile device compatibility.