It is possible to set the CPU Affinity to use only one logical core when the game has already loaded, my findings is this will limit the game to use about 1-2% CPU and reduce about 5x the usage on my machine, it gives some weird side effects, however I am not worried about these as long as the game continues to run. The affinity needs to be set back to full for world loading or the game might stall out and crash to desktop. I tried to write a plugin for this but I am getting access denied issues. Perhaps I am doing something wrong, but I just wanted to point out this trick for those looking to squeeze some extra juice out of the box.