flight

Hi, I´m new here and to the game. I played the alpha today for about 4 hours and I´m completely stunned by the gameplay, graphics and animations. I think those are the most realistic graphics I´ve ever seen :) Now here is my question: I have an i5 3570k @ 4,2GHz | 8GB 1600 Ram | GTX 660 I choose the ultra preset from the graphic tab and I get about 30 frames in Multiplayer when I´m going with 6-7 other people. So 30 frames are not bad but it isn´t smooth. So I decided to lower my setting to some mid settings, turned down AA postprocessing and stuff like that. And to my surprise I gained about 4-7 fps... To gain some serious fps where the game runs smooth I have to really turn down the settings to low :( and then the game looks shitty So do you think my GTX660 is a little to weak ? Or is it just because it´s not very well optimised ? Because when I lower the settings from ultra to mid I expect some serious fps gain which did not happen.