I tried to mine on coinmine last night and with 4, 7950s it said I only made 3 coins last night, I was like wtf??
Doing more or less 6 every day (getting worse by the day) with a single R9 290 and 4 big quadcores (total cpu+gpu at 3.5Mh/s during the thay and only 1Mh/s during the night).