Tochicool, it seems that although you have enough vram to edit caps you don't have enough to edit and run the caps at the same time. What you can do is export the cap to an exe, close construct and run the exported exe. I'm fairly sure that would work, at least you can run examples that way. I'd recommend getting a video card with more vram though, since it's a really slow workflow to have to keep closing construct to run the cap.