Samsung Starts Mass Producing 4-Bit Consumer SSDs

Joanna Estrada
August 7, 2018

Samsung has announced that it has started the mass production of the industry's first 4-bit (QLC, quad-level cell) 4TB SATA SSDs for consumers. He added that 4-bit terabyte-SSD products will now rapidly spread throughout the entire market.

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 per cent, making it considerably more hard to maintain a device's desired performance and speed.

The new Samsung QLC SSDs are based on the company's 1 Tb 64-layer QLC V-NAND flash as well as a proprietary controller previously used for drives powerd by 64-layer TLC V-NAND memory-probably the MJX controller from the 860 EVO. More specifically, Samsung says the 4TB SSD delivers read and write speeds of up to 540MB/s and 520MB/s, respectively.

4-bit QLC has been a tricky thing to figure out, because while the potential for higher capacity is there, write speeds tend to suffer in the jump from three bits to four.

Not only that, but that 1Tb V-NAND chip means that Samsung will be able to "efficiently produce a 128GB memory card for smartphones", so it certainly sounds like the company's plans for QLC could lead to big changes for storage in general.

"Samsung's new 4-bit SATA SSD will herald a massive move to terabyte-SSDs for consumers".

If you're interested in buying the new SSD, the tech giant says they will be on sale later this year with 1TB, 2TB, and 4TB variants, and come with a three-year warranty. Pricing has not yet been confirmed.

Other reports by Click Lancashire

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