hello im new to this forum so first of all thank you for your time in advance,and now to my problem so here whats wrong,not long before i changed my cpu cooler from an old zalman to the pure rock slim of the be quite,after i assembled everything back together i got one problem,after playing for a while(doesnt happened with a pattern of 30 minutes or something for example)my screen goes black my keyboard and mouse goes of(they are illuminated so thats how i can tell)and i also lose sound,but from what i can see my pc is still running,my cpu cooler is running my ssd is running even the graphics card cooler is running and it seems to happen while i play 'heavy' games like bf1, assassins creed and so on, when i play league of legends nothing happens no matter how much time i spend playing i tried reassemble the parts but it still happens,my pc built is fx8350 ,2x8 giga ram 1600mhz, radeon rx 580 8gb,psu theramltake smart RGB 700 watts and my mobo is 760GM-HDV asrock no oc is done or anything else, i tried updating my gpu's drivers and i even tried downgrade it but it still happens i and cant find out what is wrong.also my pc is fresh format cause i thought that this might fix the problem.any ideas?(sorry for my english)