I don't believe. I also have an core 2 duo, 2.9 Mhz. The processor mainly works on polygons, like airports, autogen, artificial traffic, etc. For textures like clouds the video card is the differential. I tried stock clouds with active sky evolution and the frames dropped a lot. Then i've installed resized 2d and 3d clouds, smaller, avaiable here in avsim library. I'm using the 6th version, the smaller of them. The 2d clouds are on the 3th version I believe, just search for resized 2d and 3d clouds. They look very good at distance, but a little boxed when near, but the benefits are good, all clouds settings at maximum and frames locked at 25 fps without any drpos, with pay aircrafts and heavy scenery. Try them or consider a powerfull videocard.