nVidia 820M problem

Hi . Recently I have bought an Asus X552L ( i7 ,4 GB Ram , nVidia GF 820M ) and since then there is a problem when I want to play CS:GO . When I play with the nVidia graphics processor this is happening : http://sendvid.com/aiulvft5 . I am sure this is a video card problem because when i play...