I need realistic graphics and for it to run smooth on my fsx. What do I need? Idk if I have the right stuff. ?

The choppy graphics is slow framerate caused by slow or outdated video card or Old CPU. Most games now recommend at least a video card and dual core processor. I have a dual core processor and tried to run jericho and it was choppy till I bought a video card. So if I was you I would start with a new pci/agp video card! You can pick them up for fifty to two hundred like I paid or more! Don't rely on onboard video card!