The two major South Korean DRAM manufacturers are each preparing to discontinue their older DDR4 production lines. Following Samsung Electronics’ early April announcement of its end-of-life (EOL) plan, SK Hynix recently notified suppliers with an EOL letter regarding DDR4 chips. The company plans to phase out 8GB and 16GB DDR4 chips produced using the 1z nanometer process, officially entering the discontinuation stage by April 2026.