Ok a few far fetched tries:
-try setting the shader count in case it is misdetecting them (?) with --shaders XXXX (numbers of shaders on your card)
-try tc value of 1, then 2, then 4, 8, 16, 32 etc (I know it sounds funny but try it),
-reduce intensity from 13 to something less.
-try one gpu at a time
-delete the .bin files
.bin files have been getting deleted each time I try something new. Ran with just the shaders option (1792) and intensity 8 (giving only 50kh/s), lowered tc to 1......nothing works for whatever reason. Redownloaded the miner and started from scratch. Copied the miner from my working computer, still nothing but hw errors.