I am trying to upgrade my GT60 0NC from a GTX 670m because (its on its way out), to a GTX 870m that I have here. From my research I understand that I need a certain vbios like 51x or 30P or something for the card to work. I am hoping that a bios modder can help me here. Not exactly sure what I need to do I am hoping someone else knows more about this compatibility issue. Thank you for any and all help.