Does anyone else find that around the time you do the black site and psionic gate missions, your game gets extremely laggy and starts crashing regularly?

I'm noticing my graphics card is running at 100 per cent and my CPU at around 50. I'm getting freezes and frame rate drops from 50+ to one or two often.

I also had a playthrough that got to this stage and stopped loading. If this is something other people are experiencing it would be great to know.

My hardware is dope so I'm not concerned about my computer's capability. I wonder if its long war's optimisation? Or maybe I have things set up wrong.