im not a pc whiz by no means, but i have a hp laptop thats a year old. has the dual anthlon proccesors, and im not sure what kind of graphics card. but realflight 5.5 runs very smoothly on my pc at the photo fields not so much at the 3d fields, and i have just about all the graphics cranked as high as i can get them. the only real downfall i have found with it has been playing on the interenet it seems to be slower, but i think that has to do with whoever is hosting the flying at that time and there computer being slow. or if there are 6 or 7 people all flying with there smoke on that seems to drag it down to