Offered hers is a standard TR4X-B RAID Tower, in which the original cfi-180AT power supply has been removed and replaced with a New Seasonic SS250Su, 250 Watt Heavy Duty Power Supply, Professionally installed, see photos.The Sans Digital TR4X+B Matte Black (Brushed Aluminum look) is a 4 bay RAID Tower with SFF-8088 MINI-SAS output connection for high transfer rates approximating 1,000 MB/s. This unit has been thoroughly tested and all tests were "EXCELLENT!!" This TR4X+B has been very lightly used, is in near MINT condition with almost no signs of use. You will be proud to own this TR4X+B and it should give you many years of excellent service. This TR4X+B comes with a Power Cord and a MINI-SAS SFF-8088 Cable of 1 meter length.Utilizing high bandwidth MINI-SAS (SFF-8088) cabling, the TR4X+B supports 6Gb/s SAS or SATA hard drives to deliver superior read / write speeds that are crucial in performance-driven environments such as video editing industry and high performance computer. The mini-SAS connection connects four hard drives connections into one port, reducing possible points of failures, while preserving uninterrupted data transfer. The TR4X+B supports both SAS or SATA drives, allowing users the option to choose between high performance and high capacity storage solutions. Windows, MAC, and Linux are supported.