Are you using a value with -s? You need to give the sleep time as well, something like -s0.01 which would mean to sleep for 0.01 seconds between runs. On my GPU that amount of sleep cuts the hash rate roughly in half, you can experiment to find the balance between temperature.
If you are giving the sleep time already and it's still not working, let me know and I'll investigate further

Also, it is possible to have a backup pool using the -f flag. See the FAQ in first post.
Hey kiv,
Nice update but i cant get -s to work. Says its starting but never does.
Here are some features that would be nice:
Detect if mouse is being used and switch to -f100 and then back to -f0 if mouse and keyboard are inactive or a movie is playing ?
Able to put backup pool if first one is offline ?
Thanks.