[Catseye]

Hi Sven,
The numbers do not mean the amount of cores. Also, core 0 is the first core.
Here is the info I have.

Affinity mask settings

=1 - core 0
=2 - core 1
=3 - core 0+1
=4 - core 2
=5 - core 0+2
=6 - core 1+2
=7 - core 0+1+2
=8 - core 3
=9 - core 0 + 3
=10 - core 1 + 3
=11 - core 0 + 2 + 3
=12 - core 2 + 3
=13 - core 0 + 2 + 3
=14 - core 1 + 2 + 3
=15 - core 0 + 1 + 2 + 3

Hope this helps.
I have IL2 set to 14. My logic is to leave core 0 free for the operating system.