R9 290 - 75.05 KH/s - for last 24h i have HW:0, R:0, stale: 6
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer-3.7.2-sj-0.02.exe --scrypt-jane --sj-nfmin 4 --sj-nfmax 30 --sj-time 1388949883 -w 64 -g 1 -I 17 --thread-concurrency 85000 --no-submit-stale --lookup-gap 3 --gpu-engine 1100 --expiry 10 --scan-time 1 --queue 0 --auto-fan --temp-target 75
i use this old cgminer patched build (from rmdavidson), cause after 2 hours of testing couldnt got yacminer to perform better (or i was too lazy to try more settings)