Ideally you want an Intel i5-2500k or an i7-2600k CPU clocked at 4.6Ghz or greater; an Nvidia GTX560, or better, GPU; 8Gb 1600 cl6 ram; 3 dedicated fast HDs for the OS/FSX/other, 750w power supply, and top notch cooling. That would be just about top of the line at the present. FSX prefers Intel and Nvidia parts. AMD and ATI don't provide the best performance. Again, that's from the experts --- not me.

Bruce