Prepar3D lag issuie

Wierd lag issiue.

I got Prepar3D yesterday thinking its going to be better than FSX, well, im right. Its awesome, one problem I don't believe they have yet to fix, I lag in prepar3D with a KSAN heavy scenery addon.

Now, usually this would happen in FSX, but I'm really wanting Prepar3D to be able to take full capability of my PC.

10-15FPS on the ground. 20FPS in the air (my limit of FPS) Alright, when I turn my camera around in the air to look back at the airport, it has to load?!?! In FSX it never had to load when I looked behind me.

Im running this system:

16GB 1800mhz Corsair

3930k 6 core CPU @ 4.2ghz

Liquid cooling.

GTX 770.

There should be no reason to lag when on Battle field 3 I can play on max with 30FPS+

Does prepar3D even take use of more than 2 cores?

There needs to be a 64 bit version.

Any reason why im lagging with 1 scenery addon.

ALSO how do I change the load radius so its not loading scenery behind me when I turn my camera.

Get anyyoing seeing white loading spots