It was like about 30 minutes ago, while I was typing on pages. Computer suddenly took image off on screen then beeped like 5 or 6 times instantly which scared hell out of me by the way. I've never seen before like that in my entire life. Computer shut itself down. Then I turn it on again I thought it shut itself down because of overheat which overheated it before actually. When I saw beginning of computer screen, it just like fuzzy image then it turned normal screen again. I was skeptical about it btw, I checked mac configurations again. When I took a look at display screen, it does not display gpu anymore which has been replaced by Intel HD 3000 graphics. My computer is 2011 macbook pro 17 inch btw. I'm not sure about gpu but there's something that totally wrong about my notebook. I'll take my notebook to nearest Apple store tomorrow. Question that I ask you to reply it guys, have you ever encountered thing like that or problem ? Do you think my gpu got burned ?