Feature: 1. Rear SATA3.0interface: The new upgrade expands the four rear SATA...Feature: 1. Rear SATA3.0 interface: The new upgrade expands the four rear SATA3.0 interfaces which is more suitable for narrow spaces. 2U can also be better fixed; from the rear wiring there will be no crossover with the graphics card 2. 4U 2U...more