ok so i have a lenovo h50-50, the i3,1tb, 8gb ram... but recently i have installed an i5, gtx 960(the issue) and a 600w corsair power supply. when i load into a game it loads like normal, showing me the fps i want to see. once the game starts(sometimes crashes before getting into game) i get a bunch of colors on my screen as well as it crashing. i dont know if the issue is that i have the stock mobo still or what. i have installed and uninstalled graphics driver so many times. the tricky thing is, before the 960 i had a 750ti installed and everything worked perfectly... please help 
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