QLC, or quad-level cell, refers to NAND that has four bits per cell, as opposed to SLC, MLC, and TLC, which have one, two, and three bits per cell respectively. The upside of adding more bits to a ...

Although this has boosted the storage capacity, the transition from single-level cell (SLC) to multi-level (MLC) and today’s TLC and QLC NAND Flash have come at severe penalties, mostly in the ...

This is because QLC stores four bits per cell, while other technologies store less. SLC stores one bit per cell, MLC has two, and TLC uses three, with fewer bits generally translating into more ...