I have tried to used VGA and HDMi but still it won't work. See when I start any game for example, Battlefield 4 then it loads and when the game's main menu is to come , my monitor goes blank, cpu fan starts to move much faster but my computer does't turn off. I don't understand wats going on with my desktop. Yes l've even tried stress test and it performs well but when it comes to gaming it does not respond and yes l think you should know this that 2 months before there was lighting in our area and the other day my comp won't start , then i changed my mobo and psu and it is working now but wont play any game..