SourceTwo articles have appeared recently citing sub-30% yields from TSMC’s 40nm process technology. This has the potential to impact you and I, the consumers, even on this new process node, due to the fact that ATI and Nvidia both buy products from TSMC. The 40nm production relates to both company’s latest round of GPU products.
ATI’s recent Sub-$100 ATI Radeon HD 4770 and existing Radeon HD 4870 graphics cards are built on 40nm processes. Nvidia’s latest GTX300 series are also built on 40nm processes.
Part of TSMC’s problem is high leakage, though in Nvidia’s case it is being reported they may need to send out another silicon revision for manufacturing, as there may be issues related to TSMC’s manufacturing process which can be corrected through a change in the wire layout.