Will TSMC’s Capacity Crunch Derail The AMD Stock Rally? AMD’s stock has surged nearly fourfold in the past year, driven by its EPYC CPUs capturing significant market share from Intel and the MI400 GPUs establishing themselves as a formidable competitor to Nvidia. However, a critical physical limitation—advanced packaging capacity—threatens to undermine this growth. TSMC’s CoWoS technology, essential for integrating chiplets into AI accelerators, is severely constrained. The company has fully booked its CoWoS capacity through 2026, with lead times ranging from 52 to 78 weeks. This scarcity has created a bottleneck that could hinder AMD’s ability to meet rising demand for its products. The issue stems from the unique demands of AI accelerators, which rely heavily on advanced packaging to combine processing dies and high-bandwidth memory. TSMC’s CoWoS technology is currently the industry standard, and no other manufacturer can match its capabilities. TSMC’s CEO highlighted in June 2026 that the company’s CoWoS capacity remains exceptionally limited, with expansion requiring years of planning and investment. This means the constraint is unlikely to ease in the near term, creating a persistent challenge for AMD and other companies reliant on the technology. Nvidia has secured the majority of TSMC’s CoWoS capacity, claiming approximately 60% of the production, or around 595,000 wafers. The top three clients collectively account for over 85% of total output, leaving AMD with only about 105,000 wafers, or roughly 11% of the total need. This allocation highlights the stark imbalance in access to advanced packaging resources. While demand for AI accelerators is growing, the scarcity of packaging capacity has shifted the bottleneck from demand to supply. AMD’s situation is further complicated by its internal competition for limited resources.#amd #tsmc #co_wos #epyc_cpus #mi400_gpus
