Thought I would post this I found it interesting http://www.semiconductor.net/article/438968-Nvidia_s_Chen_Calls_for_Zero_Via_Defects-full.php
This is one of the main reasons Fermi has troubles, as far as I am aware. ATI engineered around it while Nvidia yelled at TSMC about it.
Well, I *DEMAND* a cool, power-saving, yet blisteringly fast and cheap nVidia GPU. Turns out, we can't always get what we want. Good read, though.