Last week I built a new system with a GTX 670 as GPU, but I noticed something as I switched my monitor cable, attached to a VGA to DVI adaptor to my old pc and back to the new one again. It looked like the - shaped gap on the DVI port on the video card had widened, and I couldn't get the adaptor to fit in there anymore. A little while later I succeeded, and it fit again. Now I noticed that the - area has widened again. Is this adaptor ruining the DVI port on my video card?