well thanks!
That makes things clear for me! Yes I set to 17..but bcause I had no idea was realted to cpu!
I have a quad core ( not yet 7i!) so I will set to 4 from now on!
Thanks for clearing it up!

"'you shut up!  or I'll bring democracy to your country! "
Cris Galvão aka Softcris  - www.crisgalvao.com
(or softcris, SoftCris)
Rendering since 1997 and
at Renderosity since 1999.
OS Win 8.1     64 bit