Hi. I'm sort of new here so I'll be quick about it. Originally my computer would only play league of legends without crashing. If I tried to play a game from steam, I would get maybe 5 to 10 minutes of gameplay (if that) before it would crash. After messing with the clock settings a little bit, maybe 5mhz less and a little less or more voltage, it now artifacts and then does the same thing as it did before. I have a Sapphire Dual-x R9 280x. https://vid.me/sdK8 I finally got a video of what happens, You'll notice the crash but the audio keeps going but I cant do anything. I can only ALT CTRL DEL out and sign out of my account and then sign back in to reset it. If i alt tab it wont let me see my mouse past the start bar. Any help would be appreciated. Even if its just letting me know that I need a new gpu