Dell Alienware X51 R2 with GeForce GTX 760 Ti (OEM): in search for Debian/Testing installation manual

Could anyone lead me towards NVIDIA installation manual for such hardware? Google isn’t much of a helper. I had a lot of advices given here with resuls given on the same link. As I can see there are people who managed to solve this kind of hardware problem. But steps devided manual is really appreciated. So far each attempt to follow wiki ends in disabled NVIDIA card 3-D graphics mode. I’m alone with shell here. My hardware details are in signature. Rest could be found under above mentioned link.