So, In my older rig while gaming the computer would freeze and screen turned grey so i suspected the video card is failing. I ended up pulling it out and putting it in my newer computer to see if it does the same thing. But when i put it in my newer computer, it would boot but then the main hd, 1 dvd drive and fan stopped working. So i took the old video card out and put my newer one in, the same thing would happen it wouldnt detect the main hd, 1 dvd drive and the back fan wouldn't work. I found that by wiggling the cables around abit everything would just go back to working like normal. So is it that the power supply in my newer computer is failing, or the video card did something funny to it? or the cables? I'm at a loss so any help would be appreciated.