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.

Rev B

Someone asked that I measure the actual chips - they are 30mm^2.

all PCB design files released. here:
https://github.com/ngzhang/Icarus

Those packages look like 1mm grid thermally enhanced flipchip BGA ... guesstimating by the 0.1" headers ... 29x29mm FF780
so if these are SIII, pretty much "could be anything from a L50 to a E260"
One thing kinda throwing me off... if those are HCs, 1.1V core doesn't make sense. HCII is 1.2V and HCIII and IV are 0.9V.
As for "what SIII would you need for that"... depends on how much time you spend optimizing, first guess would be 2 unrolled engines with 1 pipeline stage per round, each running @ 250MHz... gut feeling says a L150.
So, random guesses:
a) these are HCIIIs, they prototyped with SIII and forgot to update the label for vcore.
or
b) only SIII based prototypes exist, once they get enough pre-orders HCIIIs get ordered (about 8wk if you rush assembly... possible.)
or
c) they somehow got a whole bunch of large SIIIs really cheap.
or
d) something entirely different.

All cards are tightly packed together with no extensions inside an Antec 1200. A scythe 135cfm fan is blowing directly onto the video cards. I'd also like to mention that it's also quiet, you can place it in another room without hearing it in the next.

I know I can overclock these to get 1GH by shoving fanspeeds up higher, but how much higher can they run before wearing down the fans?

UPDATE: My card now steadily cranks out 324.6Mh/s @ 1010mhz core with 360mhz mem, all at stock voltage. Updating the phatk kernel is key to maxing out hash rate, going to the current version bumped me up a solid 10Mh/s, not bad for simply updating phatk.

http://dibbz.net/pictures/

8x Sapphire Radeon 5830