hi guys, new here too i also got the 777 200 and 300 on the sale, and also got the 767 300.
my specs are almost same as stigandre7 core i5 2500k (default core clock 3,30ghz) evga gts450 8gb of ram(1333Mhz)
i get an average of 15 fps with the 777 and 20 fps with the 767, in fact i get 20 fps with all my add on aircraft.
said this there is a tweak that Works for the 777 now i get 20 fps like the other add on aircraft.
look for it in the forum is in topic called light Vc in the 777 wish section.
this 777 VC need a rework by captain sim as it has too much useless 3d objects in it, the 767 has less poligon count so you get better fps, i tested a lot these days. many landings in many different add on airports. 777 captain need a light VC for the next update. for now you can use the tweak.