NVIDIA is formulating a long-term chip manufacturing strategy that will see its interests secure by the time chip manufacturing has moved on to 14 nm (which follows 20 nm and today's 28 nm), which could arrive around 2015. Chip manufacturing by foundry partners is a potentially major irritant for NVIDIA, which wants to see wafer sizes getting increased from the current 300 mm manufacturing at TSMC, to 450 mm, and fast. TSMC will achieve 450 mm (18-inch) wafer manufacturing capability only by 2015. Another irritant for NVIDIA is TSMC's change in business model, which charges fabless customers "per wafer manufactured", rather than "per working chip yielded", giving them what they perceive to be the shorter end of the stick. NVIDIA is thus rigorously evaluating other foundry partners. We know from a slightly older report that Samsung has sent NVIDIA test chips manufactured at its Austin, Texas facility. There is talk that NVIDIA could also seek partnerships with GlobalFoundries, of which AMD recently relinquished all its stakes on. NVIDIA needs reliable, high-volume foundry partners that can keep it competitive not just with its main business of GPUs, but also a potential gold mine that is application processors. 
Source: VR-Zone
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