Samsung 4TB SSDs

Samsung starts mass production of the first 4TB QLC SATA SSDs for the consumer market.

Flash Memory Summit, an annual storage conference, where all of the latest flash and memory technology is usually released, has put out the news today.

Samsung is aback this year, as it is usually a premier conference sponsor and dominates this business.

Samsung is going have tough competition with its announcement now, as QLC announcements from Intel, Micron, Western Digital and Toshiba are going on, which leaves SK Hynix as the only flash-fabber that hasn’t announced a new QLC product.


Samsung Flash – Year Bits per Cell Nodes Chip Capacity Drive Capacity
2006 1-bit SLC 70nm-class 4Gb 32GB
2010 2-bit MLC 30nm-class 32Gb 512GB
2012 3-bit TLC 20nm-class 64Gb 500GB
2018 4-bit QLC 4th generation V-NAND (undisclosed lithography) 1Tb 4TB


The QLC flash is based on the same 1TB V-NAND which is used currently as a base for TLC flash. Three bits are stored in a TLC flash cell, making the technology denser and cheaper than previous-generation flash.

Now, QLC flash stores four bits per cell and assures to bring even lower prices and higher capacity SSDs to the market soon.

But, extra 33% storage density may result in low performance. So, the new NAND with 3D manufacturing technology have made it for light-use applications, which includes desktops.

Samsung claims that it has resolved the typical challenges with QLC flash and can maintain the same speeds that it achieves with its TLC SSDs, like its popular 970 EVO series.

Company will continue to leverage much of its existing technology, like TurboWrite and its proprietary SSD controllers, and promises sequential throughput of 540/520MB/s read/write.

It hasn’t provided random performance metrics or endurance, both of which are more important than sequential throughput. The 2.5-inch SATA SSD will come armed with 32 chips based on the company’s 4th generation 64-layer flash.

There is a plan to come up with 1TB and 2TB models later in this year. The company is also developing a 128GB QLC memory card for smartphones.

The availability dates, price, or product name of Samsung 4TB SSDs are likely to be out soon.


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