Guys i'm getting
303 MH/s for a 7970
and 2x167 MH/s for a 5970 (2 cores)
for a total of
630 MH
u think is a good speed ?
thats what i get on my 7970, i think thats about right
you should get about 380 with 7970 @ 1150/1000 for gpu/mem clock

Any suggestion for 7850 and 7770?
sorry, not sure about those.
managed to get 330x3 from each card
i use
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --keccak --gpu-fan 85,85 --gpu-engine 1150,1150 --gpu-memclock 1000,1000 --gpu-powertune -20,-20 -I 14,14 -w 256,256
for 387khps per each r9 280x which is basically the same card as 7970