ati 7990 x4

[mastercracker]

vclrun ./oclHashcat-plus64.bin -n80 --gpu-loops 1024 -m 2500 -a3 -1sdfg12345

I assume that -1 sdfg12345 is a custom charset. You seem to be missing the mask at the end of the command line. Make sure that you give enough work to your cards. With that custom charset you should at least try to crack 14 characters long to make sure you give enough work like ?1?1?1?1?1?1?1?1?1?1?1?1?1?1. To simplify things you might just want to test ?a?a?a?a?a?a?a?a.