So i got this graphics card its a gigabyte gv-nx73g128d-rh and when i plug it into the PCI or PCI-E (not sure but it worked in it) slot and connect my cables and turn my computer on it shuts down instantly and to get the computer working again i have to unplug and re-plug the mother board essentials. I can use my mother boards graphics card fine and ive used this graphics card multiple times then one day it started doing this. So i want to know whats wrong with it, is it broken and if it is can i fix it? Dont bother telling me that my mother board is better than this graphics card because its not ive got and have modified a Dell Optiplex 745 with its orignal mother board so no way in hell can i play the little games that i want to play.