what exactly does the -g flag do?  I can't seem to find it in the --help

again with your settings my display driver crashes, but if i set it to g1 then it goes just fine but only at about 550khash

with my settings g1/g2 didn't seem to make any difference  (edit) before it didn't that is ...  now with the 13.8 driver g1 crashes my setings, but g2 works

so for now with 13.8- your settings g1 works g2 crashes, my settings g1 crashes g2 works