Just wanted to welcome you Alpha folks and say you should try out multiplayer flight when you get a chance. It's a whole new world of experiences especially if you manage to meet up with other VR pilots. Formation flight is much easier in VR than it ever was on a 2D screen and the visuals are amazing! You can judge distances much easier and make corrections much sooner and much smaller since you perceive the speed and distance changes much sooner than with a 2D projection on a monitor.
It's a whole new world.
This was the original text: Big tip for those new to FSX - turn off hyperthreading if you have an Intel CPU that can do it. It was on by default in my BIOS but turning it off really helped performance. Upped my system's performance by 50% or so. It's an old trick for non-VR FSX users but it applies in VR as well.
Here is the new information: Seems this may be a combination of things and setting your affinity mask should allow you to do the same thing. You may want to leave hyperthreading on and just properly configure your affinity mask as there are benefits to hyperthreading especially if you don't have many cores in your CPU. But if you don't have either set, check your task manager in the view where you can see the load on each core and see if you have twice the number of cores as advertised for your CPU. If you do, hyperthreading is on. Then if your fsx application is really cranking on the second core, you probably want to learn more about the affinity mask and set it properly to move fsx off of the core pair that is also hosting system threads. The system threads will be constantly interrupting fsx otherwise and really impacts performance. Anyway, just something to check and you may be able to pick up a big performance boost if you haven't set any of this up. Or, you can try just turning off hyperthreading in BIOS to see what that gets you as that should move fsx off the same core with system processes if you have more than one core. If you get a big jump in performance then you really need to look up how to set cpu affinity in your fsx.cfg file.
Also, when filing bug reports, it helps Dan if you have your setup information in your signature or included in your posts.