AN SSD with NVMe, Like the Samsung 950 Pro, will be about 4 or 5 times faster than a SATA drive. NVMe drives use either the M.2 slot or a PCIe slot. For the majority of users, a standard SATA SSD makes more sense because they are so much cheaper and even though 5 times the performance sounds impressive, if your talking milliseconds to complete a task, will you be able to tell the difference between 5 milliseconds and 25 milliseconds? The faster drives would be more practical for someone routinely transferring very large files.