Best of luck with the change. I have just updated MOBO, Ram and CPU and am literally just getting online. Only took me a little over an hour to change all that over and i have done a test run on FSX with no changes to the setup. What was giving me an unreliable 20 FPS most of the time with drops down to 6 FPS at times is not locked rock solid at around 90 FPS. Next test is to move all the sliders ( currently 50 to 75% range) all the way to the top and see what that gives me.
Sometimes a failure is a blessing in disguise.