s RM400 is a higher performance server Chassis designed for the professional environment. It is equipped with three 5.25 drive bays, room for ATX/PS2 or Mini redundant power supplies, and motherboard Support up to ssi-ceb. Front I/O ports are upgraded to USB 3.1 Gen1 specification and two PWM fans (one 120mm and ONE 80mm) are included so keep up with modern computing conveniences. As an overall package Designed for maximizing efficiency, flexibility, and durability, The RM400 is a great choice for professionals or data center engineers looking to build a server.