I've run into an issue where after a while of normal gameplay whilst moving the game sort of freezes. My character stops though I can move the camera around. It eventually unfreezes. What seems to be happening is that for some reason it basically stops reading from the drive at its normal rate. Typically for my system its constantly reading 40 - 100MB/s some times peaking much higher 180 - 300ish MB/s. However during the freeze its only reading at 25MB/s.
Its really frustrating. No obvious limits I could be hitting, there's RAM and VRAM available