Samsung starts producing high-capacity 4-bit SSD

Doris Richards
August 8, 2018

Samsung has announced that it is now mass producing the industry's first 4-bit QLC (quad-level cell) SSD for consumers.

Executive vice president of memory sales & marketing at Samsung Electronics, Jaesoo Han explains that "Samsung's new 4-bit SATA SSD will herald a massive move to terabyte-SSDs for consumers". Through the use of a 3-bit controller and Samsung's own TurboWrite technology - which drastically increases sequential write speeds using algorithmic magic - the company puts its latest consumer venture as quick as other fourth-gen TLC SSDs it produces.

Samsung hasn't released official pricing for the in-production drives, but its 4TB 860 Evo is now selling for over $1,000.

A major impediment to making 4-bit NAND a reality has been the substantial performance hit due to lower charge levels. Stack enough of those together, and you can get a lot of storage in the standard 2.5-inch SSD form factor at lower costs.

Created to increase the capacity available from each NAND chip, QLC is a form of multi-level cell technology which allows four individual bits per memory cell - vastly increasing capacity over the company's existing triple-level cell (TLC) equivalent.


Though Samsung has high hopes for this new 4TB SSD. Evidently the company is confident in its 4-bit V-NAND's reliability.

This makes it considerably more hard to maintain a device's desired performance and speed. To truly spark the spread of 4TB SSDs among consumers, Samsung will need to drive the price down in a significant way, and that's what the company is aiming to do with its mass production.

The Samsung 4TB 850 EVO SSD is now listed on Amazon.co.uk with a £1,399.99 retail price (albeit discounted to £999.99 at present).

Samsung is also planning to use its 4-bit V-NAND chip in microSD cards.

Other reports by Iphone Fresh

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