Quote

"For newer computers that possess PCIe 3.0 interfaces, the Samsung and Mushkin drives can reach 2,150MB/s read speeds and 1,550MB/s write speeds. (In comparison, a drive using a SATA 6Gb/s interface can only transfer files at a maximum speed of 600MB/s.)"

http://www.zdnet.com/article/ces-2015-new-m-2-pcie-2-0-drives-show-off-future-of-solid-state-storage/