This question is based on another question submitted here: Is it possible to make illegal clones of an Intel Core i7?
More specifically, it's based around this quote:
I've been led to believe it's something like a 60% yield (i.e. they produce 100 processors they only get 60 that actually work) and the rest have to be discarded.
I'm incredibly curious now. What's the usual yield like for AMD and Intel CPUs? Is this actually documented anywhere or is it something not often spoken about by either company? Are there any articles or external information AMD and Intel have released on the failure rate of the CPUs they produce?
Also, is there any documentation on exactly why AMD or Intel CPUs might fail during production? I understand today's CPUs are immensely complex beasts, but, given the environment they're manufactured in, is a 40% failure rate really that acceptable (assuming the poster's claim of a 40% failure rate is even accurate)?