Even worse, P3D will turn on Dynamic Texture Streaming if VRAM runs low. This causes flickering textures and other bad things. It has to be manually turned off since a saved Display Profile does not capture that option.
If you almost run out of VRAM and don't realize it was turned on, you might not know why your future flights have object texture flickering. Keep an eye on that setting if you have a VRAM stop or get close.
Rod