FSX Quad Core

I upgraded from a Dual Core to Quad Core a little while ago, and I only just read you are supposed to manually edit the config to enable four cores.

To enable all four cores, you locate the FSX.CFG file in your "%userprofile%\Application Data\Microsoft\FSX" folder and add the following:

[JOBSCHEDULER]
AffinityMask=n

(Where "n" refers to the number of cores scheduled
1 = 1 core
3 = 2 cores
7 = 3 cores
15 = 4 cores)

But, I've run performance monitor while running FSX with and without the FSX.cfg changes and the changes seem to make absolutely no difference. In external views FSX is maxing out all four cores even with the FSX.cfg changes missing. Highlighted here with the green box:


I've made the change, but haven't noticed any significant change.