There is no Intel bias for the benchmarks I linked you to. All CPUs are listed at stock speeds. You need to understand that Nr of Cores X Clock Speed does not equal work done equally between all CPU architectures. I have been an AMD fan for a long time (see also my sig) and have learned that the current Intel CPUs get more done per core per clock pulse than AMD CPUs do. Right now, I'd take the Intel i7 3770K which offers the best bang-for-the-buck, particularly for running X-Plane. Rendering programs employ far more threads than X-Plane will, and the 8-core FX8350 may very well be fine for that. That's why I built a quad GTX680 rendering machine for my son (an architect) that renders with 1536 x 4 GPU cores using OctaneRender and V-Ray RT. Kieran is correct stating X-Plane drives the GPU with one thread.