Samsung finally brings 3D V-NAND to consumer SSDs with the 850 EVO

Things have advanced quite a bit since our last thoroughly in-depth look at how solid state disks work, and Samsung has been one of the biggest companies leading the charge toward faster, denser solid state drives. Its 840 EVO was the first consumer SSD to use TLC NAND—that’s triple-level cell NAND, which can store three bits per memory cell instead of one or two. Now, Samsung’s newest consumer SSD takes NAND density a step further, stacking the memory cells on top of each other in a complex sandwich. The 850 EVO, formally announced this morning, uses 32-layer TLC “V-NAND,” where the “V” stands for “vertical.” As we discussed previously at the 2013 Consumer Electronics Show, Samsung is the only SSD manufacturer that makes “the whole widget”—it’s the only vertically integrated OEM that builds every part of the SSDs it sells, including the NAND that actually holds the data. This gives the company a distinct advantage over other SSD manufacturers—most of whom source their NAND from Samsung.