I'm not sure if this applies to crysis 2 only or not
You know when you move your mouse to the top right corner there will be tools appear
But the problem IS
WHEN you play crysis 2 and you move your mouse to top right corner
IT alt tab and tools appear
In case that happen you will get invisible texture for anything that load way too slow
You can fix that by alt tab

I think this happened to GTA IV too maybe (which result in hardcoe stuttering and lag)
Currently i can't set crysis 2 to full screen when playing with DX11 too (also sleeping dog)
But that is another problem that not related to this topic

I don't think we can fix this
But i'm gonna try on another game

Not a edit : Okay i tried on team fortress 2 It not appear look like it happen only on crysis 2

Oh i forget to mention
I set my crysis 2 resolution to 800x600 could that be a problem because i set that to gta iv too