I would really like to know what they can reach, and with what wattage. Hopefully some will be in stock soon.
I got my 290X, but when hashing scrypt using cgminer, I get lots of HW error. Cgminer 3.3.1 as well as 2.11.2.
I have tried almost all reasonable setting of clock speed / memory speed / shader counts, lookup-gap, thread concurrency, etc, but I cannot get rid of HW errrors. It mines SHA256 without any hardware errors at 750MH/s. I am using AMD drivers beta 8, the one released on Oct 30 2013.