Samsung currently uses TLC NAND in its SSD 840 Series drive, but that drive to date has used 64Gb flash chips.
Samsung started production of sub-20nm-class 64Gb MLC NAND flash memory in November last year. Over the past month, it has begun adding the new 128Gb NAND flash to its flash memory offerings. The new 128Gb chip also extends Samsung's 3-bit NAND memory line-up along with the 20nm-class 64Gb 3-bit NAND flash chip that Samsung introduced in 2010.
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