Market Overview

Samsung Electronics Starts Mass Production of Industry's First 4-bit Consumer SSD

  • New 4TB QLC SSD features performance levels on par with 3-bit SATA
  • Offers 540MB/s read speed, 520MB/s write speed and 3-year warranty

Samsung Electronics Co., Ltd., the world leader in advanced memory
technology, today announced that it has begun mass producing the
industry's first 4-bit (QLC, quad-level cell) 4-terabyte (TB) SATA
solid-state drive (SSD) for consumers.

This press release features multimedia. View the full release here:

New Samsung 4TB Quad-level-cell SSD (Photo: Business Wire)

New Samsung 4TB Quad-level-cell SSD (Photo: Business Wire)

Based on 1-terabit (Tb)* V-NAND with outstanding performance equivalent
to the company's 3-bit design, Samsung's QLC SSD is expected to bring a
new level of efficiency to consumer SSDs.

"Samsung's new 4-bit SATA SSD will herald a massive move to
terabyte-SSDs for consumers," said Jaesoo Han, executive vice president
of memory sales & marketing at Samsung Electronics. "As we expand our
lineup across consumer segments and to the enterprise, 4-bit
terabyte-SSD products will rapidly spread throughout the entire market."

With its new 1Tb 4-bit V-NAND chip, Samsung will be able to efficiently
produce a 128GB memory card for smartphones that will lead the charge
toward higher capacities for high-performance memory storage.

Typically, as data stored within a memory cell increases from three bits
to four, the chip capacity per unit area would rise and the electrical
charge (used to determine information from a sensor) would decrease by
as much as 50 percent, making it considerably more difficult to maintain
a device's desired performance and speed.

However, Samsung's 4-bit 4TB QLC SATA SSD maintains its performance
levels at the same level as a 3-bit SSD, by using a 3-bit SSD controller
and TurboWrite technology, while increasing drive capacity through the
use of 32 chips, all based on 64-layer fourth-generation 1Tb V-NAND.

The 4-bit QLC SSD enables a sequential read speed of 540 MB/s and a
sequential write speed of 520 MB/s, and comes with a three-year warranty.

Samsung plans to introduce several 4-bit consumer SSDs later this year
with 1TB, 2TB, and 4TB capacities in the widely used 2.5-inch form

Since introducing the 32-gigabyte (GB) 1-bit SSD in 2006, which ushered
in the PC SSD era, to today's 4TB 4-bit SSD, Samsung continues to drive
new thresholds for each multi-bit generation.**

In addition, the company expects to provide M.2 NVMe SSDs for the
enterprise this year and begin mass production of 4-bit fifth-generation
V-NAND. This will considerably expand its SSD lineup to meet the growing
demand for faster, more reliable performance across a wide span of
applications, such as next generation data centers, enterprise servers,
and enterprise storage.

* 1Tb (128GB) x 32 = 4TB (4,096GB)

** Samsung's mass production history of SSDs in bits per cell

Year   Bit   Nodes   Chip Capacity   Drive Capacity
2006   1-bit SLC (single-level cell)   70nm-class   4Gb   32GB
2010   2-bit MLC (multi-level cell)   30nm-class   32Gb   512GB
2012   3-bit TLC (triple-level cell)   20nm-class   64Gb  


2018   4-bit QLC (quad-level cell)   4th-gen V-NAND   1Tb   4 TB

About Samsung Electronics Co., Ltd.

Samsung inspires the world and shapes the future with transformative
ideas and technologies. The company is redefining the worlds of TVs,
smartphones, wearable devices, tablets, digital appliances, network
systems, and memory, system LSI, foundry and LED
solutions. For the latest news, please visit the Samsung Newsroom at

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