dx12 mgpu support having issues

Hey guys I'm having trouble running in dx12 with mgpu on  it gets to the it gets to the loading screen says optimizing cores then the game locks up when I run with a single GPU in dx12 no problems at all I have tired turning off CF I make sure in the settings box I click multi-gpu support  any help on fixing this issue would mean a lot my setup is I7 5820k two fury x 16 gb ddr4 running on a ssd