QNAP TS-251 is discontinued TS-251 High Performance NAS with On-the-fly & offline Video Transcoding for SOHO and Home Users TS-x51 Series • Dual-core Intel® 2.41GHz CPU and 4GB/1GB DDR3L RAM, delivering up to 220MB/s read & write speed • Run your NAS as a PC with build-in QvPC Techn