Quote from: mrb on March 19, 2013, 05:30:44 AM

Quote from: johnyj on March 18, 2013, 07:35:44 PM

I remember that someone discussed before, going from a 110nm process to 65nm process in principle won't generate a 80% increase in efficiency, the best estimate is around 50%. There was a possibility that Avalon had an unefficient design, then BFL might gain another 30% efficiency by using a better design

In principle going from 110nm to 65nm reduces power consumption by 65% (1-(65/110)**2 because power efficiency is proportional to the inverse of the square of the feature size).

But the process node is not everything. Consider ASICMINER for example: they have chips that are more power efficient than Avalon, despite the worse process node (respectively 130nm vs 110nm). ASICMINER does 167 Mhash/Joule vs Avalon doing only 150 Mhash/Joule.

Check this:

Quote from: BitSyncom on January 29, 2013, 01:45:51 PM

However, I must warn you (Inaba), don't place trust in the wrong people and what they tell you; for when that moment comes you won't able to meet the advertised specifications, at no real fault of you own besides ignorance since you really believed BFL. Be ready to take the spear to the chest as you were their spoke person. I wish you the best of luck and hope BFL can ship on time for when that time comes this forum can go back into the ol' days of competitive spirit of reducing power consumption and increasing hashrate of each others product.