I use Realvision ENB option 1 w/ all the recommendations and the full option on my GTX 470 and things run smoothly, but two or three times trying to install it all I missed a couple things and I ended up having unplayable (to me, any noticeable frame lag is "unplayable") FPS, even w/ performance. So two things I found when I was installing RealVision ENB (hopefully this is relevant to other ones): - Read the mod author's recommomendations thoroughly and follow them exactly - Make sure you look at the optional files on any other graphic mods you're installing, they might have ENB versions or patches which you will need to use in conjunction with or instead. You wouldn't think missing one tiny patch or one line in skyrimprefs.ini or one non-enb version when one is available would matter, but they all do.
