Recently, I noticed when playing some games (Mirrors Edge Catalyst, Fallout 4, etc), my graphics card kept crashing around 10-20 minutes into playing the game. I checked for new updates, I disabled any overclock's I might have had running, but nothing solved the problem. I have an AMD Sapphire Radeon 270X 4GB, as well as a 500W power supply, so I don't THINK its a power issue. The only thing I could see being a problem would be my temperature. After that 20 minute play session of Fallout 4, it's standing on 47°C. It used to run much cooler, but over time, it just kind of went up. Something that my be causing this, might be my fan, on the back of my tower. I have it set to custom to run 80%, and it works fine, but I don't feel any air coming out of the back. Any help is greatly appreciated. Thanks!