I'm seeing about 20 MH/s out of each of my 3x R9 280x, split between 2 different rigs at this point.
 Gigabyte 3GB Windforce units, 1100/1500 and running pretty cool at those settings despite the somewhat hot weather we've had this week (as opposed to my Sapphire R9 290s that are thermal limit throttling some despite the massive airflow in their cases).


 I do wish the R9 2xx cards would pay attention when I set their clocks to UNDERclock with ATICONFIG. 8-(