unbinded1, is your lagg focused around a specific part of the game? Does your motherboard have integrated graphics? Have you used anything to clock how much memory, cpu or gpu power is being used during the game?
Also, how much memory do your two 6970's have? Also, how much memory do you have on your motherboard?
A lot of the textures have been updated, which means that if you little memory in your gfx cards, or your bandwidth is small it would have trouble with the larger textures.