Have a full 10 chip prototype board hashing now finally, plus five more on another board. 23.3GH on ten chips, 12.7GH on the other five.
Whats the heat like?
More than I'd like... My proto boards are 20 square inch, and about 30W, and I'm seeing a 44C rise with a fan blowing on the bottom.
The production boards are 35W, and only 8 square inches. My biggest concern at this point is whether I'll get the heat out of them.