The SK hynix headquarters in Icheon, Gyeonggi, on July 24. [YONHAP]   For the first time in more than three decades, Samsung Electronics has been unseated as the world’s top DRAM maker, with SK hynix seizing the crown on the strength of booming demand for AI memory chips and an exclusive supply deal with Nvidia.   Samsung Electronics’ global DRAM market share fell by 8.8 percentage points over the past six months — its sharpest decline since the company began dis...