Recently i bought a Gigabyte HD 7850 and i installed it into my system, but when it booted up and it ran for some minutes the pc crashed, i booted up again and i noticed that the fans were not spinning, so i decided to order replacement fans, After i installed the new fans into the gpu i put it into my system and the fans were still not spinning, but this time the fans moved for a millisecond, not even a full spin they moved just a little bit. Looking for some help regarding this issue.