Samsung quotes exactly the same numbers for the new 2TB 850 Pro as existing Pros down to 250GB. That said, Samsung's performance claims make it clear they don't think the upped capacity comes with any performance downsides. The market is so competitive, not many SSD makes are keen to give up the technical secrets of their controllers, sadly. Consequently, the new 2TB has a new controller, known as the MHX.Īs ever, actual technical details are thin on the ground. Samsung says its existing MEX controller as seen in the existing 128GB to 1TB 850 Pro SSDs had limitations when it comes to really high capacities. However, what we do know is that achieving that headline 2TB has required Samsung to come up with a new controller chip.

But given the density enabled by stacking multiple layers, it's plausible that Samsung's existing 3D V-NAND technology is good enough. Samsung hasn't revealed whether the new 850 Pro in 2TB format uses the same 40nm 3D memory. In practice, that means where Samsung's previous-generation 840-series drives sported NAND memory with uber-tiny 19nm transistors, the 850 series is thought to get by with 40nm technology.

Samsung 850 Pro 2TB (1TB White) at Amazon for $499.99.

Samsung 850 evo ssd drives for mac