Hi, finally after some 10 hrs tweaking, I found a good trade off between eye candy and performance. I tried several ENBs, Real, Reallike, Zoner, Real Vision, and others, and most of the Boris DLLs. Eventually, I landed to the ENB proposed by Prod80, which runs quite smoothly and is fully playable. I installed all mods suggested by the skytuner ENB, and coupled with Prod80 ENB, the result is quite good! (thank you Prod). I suffer from stuttering still. When I look a very dense scenary, for example down from dragonsreach, the pc suffers, and stutter occurs. Once all the textures are loaded though, then the same scene runs smooth. So I think is a RAM related problem. I start thinking that the problem resides in crossfire. I'm not convinced my crossfire is actually working, even with TESV profile. So I end up having just one HD 6870 1Gb ram which is not good for the game modded. I'm thinking about getting a brand new GTX 680 with 4 Gb onboard instead. That should work, because the crossfire cards do not share the memory, as usually reknown.