Multipool question about X11 and mining with Lazybear!!
Are there already some good configs around for 290 cards on the multipool ?
Cant get the right hashed and driver keeps crashing!!!
If someone have the right setting file for the multipool, please share
125UTC Reward 
Try this one:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
.\sgminer\sgminer.exe -k x11mod -o stratum+tcp://stratum.cryptotrain.net:4444 -u your wallet -p x -I 17 --gpu-engine 1000 --gpu-memclock 1400
If this works you can add another parameters such as thread-concurrency and tune intensity and gpu-engine.
Use ltcrabbit mode and 13.12 driversa 290 should be able to run I 18 without issues. Maybe higher. I would also recommend g 2 (2 gpu threads) and experiment with w 256 and w 128.
Good luck.