What's your 5930K clocked to? I used to have that CPU. One of the things I hated about it was the memory controller, as it was Intel's first DDR4 memory controller and it had some bugs. Broadwell-E CPU has a much better memory controller than Haswell-E, with better performance and stability with higher frequency memory. But yeah I see your point. You are definitely being CPU limited, but big games like Jedi Knight Fallen Order that use DX11 will be a rarity in the coming years I reckon.