Waffelen

Hi guys, As the title say i have an old m15x with a 920xm, 8gb ram and just got a 770m to boost gaming perfomace but the drive wont install. When I run GPU-Z I see the attached image which are all the correct stats of the card but not really the card and HWINFO64 is showing that its the correct card but again not anything else. I've read about .inf issues and about vbios flashing but dont know how to do either or which would be best to try. Any ideas which (if either) could be my problem and how to do either task or how to go about more trouble shooting. Any more info required just ask. Any and all help much appreciated. I just want to play total warhammer:-(