Post
Topic
Board Off-topic
Re: 1GH/s, 20w, $700 (was $500) — Butterflylabs, is it for real? (Part 2)
by
DeathAndTaxes
on 29/01/2012, 17:47:37 UTC
So my guess is, that they use EP3SL200 or 260.
It is definitely possible to put 3 fully unrolled pipelines into the 260
(at 150MH/s each) and, with some tuning, gain the advertised speed.

One question.  Do you think it is possible for anyone with the experience necessary to design a custom FGPA board to get the power draw so wrong like BFL claims they did.

I mean 1GH @ 20W on a 65nm FPGA?  My albeit indirect knowledge says that isn't just good it is downright impossible.  I don't care what chip you use you aren't getting that level of performance from a 65nm tech.  They should have known it was impossible right?  I mean it would be like Toyota changing one component in their Prius and the simulated/tested gas mileage goes from 40mpg to 300 mpg.  It is obvious that is impossible.  Toyota wouldn't be announcing the 2013 Prius getting 300 mpg.