Utilising the industry's first PCI-E 4.0 storage controller, the Phison PS5016-E16, as well as DDR4 caching and Toshiba's BiCS4 96-layer NAND, the Gen4 SSD offers read and write speeds of 5000MB/s and 4400MB/s respectively, with 750K and 700K read and write IOPS. If you're familiar with drives like the Samsung 970 PRO or the Western Digital SN750, the best that PCI-E 3.0 had to offer, the promise of 5GB/s and 4.4GB/s will certainly get the juices flowing.