Enfin c'est fait, plus besoin de désactiver le coeur 0 de votre processeur pour que les autre fonctionne et donc avoir des fps normal grace a la mise a jour aujourd'hui.
"Fixed issue where removing CPU0 from processor affinity mask would improve performance. Added an optional "-processor #" command line option, if you want to set which processor the main thread is ideally scheduled on. By default, it will have no preference. This bug fix was identified when looking at AMD CPU performance concerns."