The IO CREST SI-PEX40151 is a great accelerated secondary storage solution for any workstation with true Pie 3. 0 x8 bandwidth. It has two SFF-8643 (SFF-8643 to SFF-8639 cable is included) to accept two U. 2 SSD Drives, so each U. 2 SSD Drives has dedicated Pie 3. 0 x4 bus bandwidth. It delivers transfer speeds 20 times faster than SATA SSDs. By by-passing the traditional Pie 3. 0 x4 NV Me solutions, using the SI-PEX40151 will allow user add 2 U. 2 NV Me into any non-Bifurcation Pie x8 slot to achieve their full potential with a bandwidth of up to 6, 500 MB/s. Unlike onboard DMI 3. 0 based NV Me solutions or Single NV Me PCI-e x4, which are forced to share a single Pie 3. 0 x4 lane with the motherboard's data ports, the SI-PEX40151 combines 2- U. 2 drives to be able to run on Pie 3. 0 x8 lane. This unique architecture allows the drive to interface directly with the platform's CPU, which provides Pie x4 bandwidth for each U. 2 SSD Drives!