jtlacc

Does anyone know how to upgrade GPU the MSI GT70-0NC? it uses the ms-1762 mootherboard,. i current have a GTX 670M 3gb. i attempted to put a GTX 870m 6GB in, thinking it would be no problem, however once i did, when i turned it on, the screen was in 8bit resolution. colors were distorted, screen was zoomed way in, and windows did not detect the GTX 870m at all, not matter what driver i put in. no, i already have tried using modded inf files, still same as problems. i have been dredging the web for two weeks now, to no avail. please please please help!