CRAZY THINGS HAPPENING IN FSX GOLD

Every now and than when I crank up FSX using my PMDG 737 NGX I get strange textures.
Things like missing levers on switches in the VR pannel Invisible AI all you see are the nav lights and beckon. Missing buildings all you see is a shadow For love of life I can not figure out why this happens
I can not find a common cause it only does this every now and then. The other problem is if I start up fsx in any plane in my fleet airport does not seem to matter and than change aircraft to the PMDG737 NGX I get the same results and some time I can not see all of the airplane in spot view parts of the fuselage or missing.
So far I completely deleted the FSX cfg file and had it make a new one because I was using Steam and I have the old beta version that uses the same cfg file as the boxed version of FSX
I use GEFORCE EXPERIENCE to keep my video card drivers up to date.
This is driving me crazy some time when I come out of spot view while in flight the same thing happens
any ideas

Things like missing levers on switches in the VR pannel Invisible AI all you see are the nav lights and beckon. Missing buildings all you see is a shadow For love of life I can not figure out why this happens
I can not find a common cause it only does this every now and then. The other problem is if I start up fsx in any plane in my fleet airport does not seem to matter and than change aircraft to the PMDG737 NGX I get the same results and some time I can not see all of the airplane in spot view parts of the fuselage or missing.
So far I completely deleted the FSX cfg file and had it make a new one because I was using Steam and I have the old beta version that uses the same cfg file as the boxed version of FSX
I use GEFORCE EXPERIENCE to keep my video card drivers up to date.
This is driving me crazy some time when I come out of spot view while in flight the same thing happens
any ideas

