AI inference boom fuels memory race, with Samsung in pursuit

The AI inference surge is forcing a structural shift from commodity DDR5 to HBM3e/4, intensifying competition for TSV and CoWoS packaging capacity and compelling GPU makers to forge deeper IDM partnerships. Samsung’s aggressive HBM push reflects strategic anxiety over U.S.-led export controls on advanced equipment—if EUV or hybrid bonding access tightens, its memory-foundry synergy collapses. SK Hynix currently leads due to early-mover advantage, but TSMC allocating more CoWoS slots to U.S. clients could redraw the alliance map. Over the next 18 months, HBM yield rates and silicon interposer costs will dictate market leadership. Firms overcommitting to a single technical trajectory risk severe inventory and depreciation shocks by 2027.