I have the following settings on my 2xGigabyte 7950s setup (I got a couple of cards n the shop):
./vertminer -o startum+tcp://stratum.vertco.in:8080 -u -p x -I 13 --thread-concurrency 14777 --gpu-engine 1050 --gpu-memclock 1500
these are the best settings I can get without getting HW errors and all I get is a whopping
327 mhs 
!!!!
Apparently everyone has r9 280x now, so I have been having a lot of trouble trying to get better settings around here

Would be awesome if more people published their configs for 7950s
Cheers!
