LUA Errors is raping my fps.

[Bläckup]

this actually sounds like a driver issue.....
try rolling back to an older driver and see if it works (Did this happen before you updated on December?) Also I believe your Intel components are making you gay.... do you wake up with anal pains sometimes, not knowing why? Dry scaly white patches of crust randomly appearing on your face? these could be very serious if left unattended, you may start showing up to school/work with your shirt tucked into your shirt, and other poofter-like behavior. Intel is great for developers/folders, but if all you are doing is fapping and pushing your FPS in video games, I'd recommend wearing a quark in your ass when you sleep as to prevent further anal pains.... I'm worried about you man :| .
If none of this was helpful, then I'd suggest playing around with your video settings, its possible some sprites tax your system more than others (though I really doubt that's whats going on), but paired up with a driver issue it could cause your video card to work harder than it needs to for no reason, bogging you down, settings like AA and MLAA could be your issue.
I'm running a 6870 at max settings, my FPS never gets below 25 (in a 25man with all sorts of AOE's going, and a dual screen streaming pr0nz at 25fps 780p), and usually sits at 75fps when I'm anywhere else, SW included (Turn on vSync you ninnyhammer, there is no reason to be sitting at 120 FPS when your eyes can't see more than 25fps.) If none of this helps then I suggest visiting this website for further help.