UE4 Freezes when ran with -DX12 arg on laptop running 2080 MaxQ without secondary screen

ok I’ve disabled threaded optimisation, texture filtering to high performance and works for a few minutes more, got a freeze upon pressing on houdini engine
…ok might be working… further testing

… almost working and after 20 mins freezes on disabling all lights, OK, at least I can do something more… still might be buggy