After 15 minutes of the game terrible friezes (Dishonored 2)

All right? Map of 1070, percents i5 4460 (Yes, botlek), but still. Watch the video on YouTube - people on high settings with i5 4460 + 960 play quietly without such friezes as I have.
I have 15 minutes begins, it is simply impossible to freesite, with each pixel rotation camera. Don't know why and how.
By the way, notice that the drive load is 99%. Restarting cures, but for 15 minutes