Hey Guys,
I'm a long time reader and a first poster here on Avsim.
I was having the same problem with my Asus UX32VD, (Nvidia 620M and Integrated Intel 4000).
Upon clicking DX10 Preview, I restated FSX and the Integrated Intel 4000 GPU would show up as the primary graphics device, and the Nvidia device would disappear.
I looked around the last two days, there isnt much help out there, just a few dead end forums, but it appears this issue only applies to mobile laptop simmers. I decided to do my own testing and came to the same conclusion that the Nvidia GPU is in fact being utilized, as verified by GPU-Z's activity sensors.
However, I'm still wondering if there are some performance losses or FSX internal conflicts that this is affecting. If anybody knows how to get FSX, using DX10 Preview, to properly recognize and register the Nvidia GPU that would be excellent. FYI, I did follow the steps outlined by Sargeski, this was my initial solution as well, unfortunately it still didnt fix the problem.
