The SI-PEX50065 PCI-Express 2.0 X1 SATA III + M.2 controller card enables one SATA III HDD and one M.2 SDD to be added to a computer through a PCI-Express 2.0 X1 slot. Featuring Marvell Hyper Duo technology, takes the advantage of the rapid respond of a solid state drive (SSD) and the spacious capacity of a hard disk drive (HDD), to form an ultimate total solution for a High performance, cost effective and large storage system. Hyper Duo uses an intelligent algorithm to automatically migrate the most frequent access data on the SSD, while all the rest of the data are safely kept on the hard disk.