I can't get this to work with my r9 270x.
If I put -I 13 in Advanced miner settings its fine.
If i add --thread-concurrency 15508 it doesn't start (also any other commands as well).
Am I doing something wrong?
Do these settings work in BFGMiner outside of MultiMiner? Unfortunately I don't have R9 hardware to test with but I know others are using them successfully.
I've only been using cgminer. When I get home I'll test out bfgminer as you suggested.