SK hynix today announced on its official website that the company has begun supplying its latest cSSD, PQC21, - the first product featuring 321-layer QLC NAND flash technology. Supply to Dell will begin in April, with plans to expand supply to other enterprise customers in the future. The PQC21 is a client SSD (cSSD) that delivers high-capacity, high-performance, and low-power characteristics. It is currently available in 1TB and 2TB, expanding customer options.