Specs: i7 @ 3.2 16GB System RAM @ 1600 Dual HD6990M's 2GB each in crossfire with latest non-beta driver (13.1) I have been having a very similar issue to this since beta 2. Just after launch, my PC beasts the game. FPS never drops below 50, even in Neverwinter city. But after being in game for 3-5 minutes FPS drops to…