Just built a new PC with a Intel i7 3770 (non K, slightly cheaper and I don't overclock) with 3.40 GHZ stock and up to 3.90 GHZ with Turbo Boost. I am running it along with a EVGA GTX 560 Superclocked 2GB DDR5 and 8GB of DDR3 RAM.
Let's just say, this has changed flight simulator for me. I can now run the PMDG NGX with FSX COMPLETELY MAXED out alongside REX Essentials and GEX with 30-40FPS solid in heavy metro areas. The rest of my planes (A2A, Carenado, Flight1) all are running anywhere from 60-80FPS rock solid.
I've already optimized my .cfg and applied all the tweaks.
I used to run an AMD X4 640 3.0GHZ Quad, which is no slouch but doesn't even compare to the i7. So I wanted to throw this out to everyone in the market for an affordable, excellent performing CPU, to check out the i7 3770(k).
Not to mention all my others games like Battlefield 3 and Skyrim have doubled in performance. I worship Intel now lol!