So i just bought a old graphic card,Amd Radeon HD 7730 and i tried to install that to my computer.The GPU fan still running good but when i plug the cable,my screen doesn't show anything and when i plug the cable to the motherboard (on board GPU) the screen light up.I enter the device manager and it didn't detect the HD 7730.Plz help.I checked the gpu and the inside core doesn't get hot,it's not too cold but not hot at all.They said that this is a dead GPU.Any solution?