Originally Posted by name='sammytomjohn'
where you said in the comment of yours he quoted you said fact! it is not fact just speculation and rumours!!
Well Fermi is on a 40nm process which thus far only has ATi and Nvidia's GPUs (I think).
And also, the process is
relatively new; there's bound to be issues with it especially with a rather large die size.
It's the way the IC fabrication process works, die shrinks on the deep sub-micron level always present issues. The leakage current that intel encountered upon switching from 65nm to 45nm is one such example which they sorted with the use of High-K Gate Dielectrics is one such example.
(Look up intel's website if you want more info)
Also the shortages of the 5XXX series is another indication that the process is not completely solid yet. However we haven't seen irrefutable proof yet, but IMO you can bet there are big issues with a new state of the art process with a colossal die size.