I want to upgrade my gtx 770 but before buying a new card I want to make sure I know how to exchange them. I 've found a helpful video and I know what to do. The only problem is I can't for the life of me figure out where my gpu is screwed to the case ( if at all? ) I've been looking at it from all angles with a lighter and have tried several things I just can't figure it out. I'm aware of the blue strap and the PCI cords.