pmdg freezes

[stepbk]

Hi guys

I run fsx along with PMDG747 and ORBX YMML V2 while Im flying online.
Sometimes the fsx freezes and sometimes it doesn't. The graphic runs slow and I dont know why. and sometimes it says "run out of virtual memory"
It doesn't freeze when I delete ORBX and run the game at low graphic. But my coputer is capable of it and don't know how to tune it or set it up.

this is wat i have


i7-930 @ 2.80GHz
Gigabyte X58A UD3R
DDR3 6144MB and 539MHz frequency
NVIDIA Geforx GTX 460

any feedback is appreciated
thanks

[BeaconOne]

FSX SP2 (or Acceleration) installed?

The FSX ability to address memory was patched in SP2.