[Stefano Zanella]

thanks for the answer, but it wasn't the problem, your solution can be helpfully anyway

my cpu is very cold, never go higher than 50c, and never had cpu 99% warning.

i just tryied myself some things after couple of hour of none answer, and i found lowering Smoke quality from extra to normal does help a lot.

so, if anyone have similar problems:

1) Watch Cpu temperatures
2) Set smoke quality lower