Ok for the last few days my computer has been constantly crashing when ever I play a game for an hour or so or less at first i was sure it was my core over heating it was at 91*C :O. So I stuck my house fan on my computer so it back down to 45*C... But im still crashing so I think it may be my graphics card. Is there any way to test if it is or not?. Because it just crashes I dont get no blue screen or any information as to why I crashed.