Much much faster than any SATA3 SSD! I bought Samsung 850 Pro but it wasn't that fast which was around 250mb/s. So I refunded today and then got Kingston HyperX Predator 240gb. After I installed it, I feel the speed. Although 240gb was slower than 500gb version, it is still faster than my Macbook Pro. I could buy Samsung 950 Pro version in future. Anyway, if you want more speed, get PCIE M.2 SSD.