Go into task manager and click on processes then right click on the process and hit affinity then uncheck whichever core you do NOT want it on. It is generally good to assign whatever is heavy (encoding) to the default core (most operations are generally stacked on this core) which is generally CPU 0 while putting your game on the unused one which is generally CPU 1
"Truth is violated by falsehood but outraged by silence."
"Mastering others is strength, mastering yourself is true power." ~Sun Tzu
"Ad Astra Per Aspera"
"Our greatest glory is not in never falling, but in rising every time we fall." ~Confucious
"The true measure of a man is how he treats someone who can do him absolutely no good.” ~ Samuel Jackson
“Omnis vir est fortunae faber”