Hey guys. So I just installed my new R9 290X that I bought from Ebay about two months ago, and I've been gaming for about a solid month on it. Up until last week, I had no issues. I loved the performance. But after a while of gaming, the PC will randomly shut down. It starts itself back up though, and when I start playing again right away, it shuts down and restarts again. If I let the PC sit for a while, then I start playing again, I can play for a while before it does the random reboot. Is this a heating problem with the R9's stupid hot operating temperature? Should I get an aftermarket cooler on the sucker? Or am I having driver issues? I've downloaded and installed, uninstalled, reinstalled the latest drivers, and I've even tried beta drivers. Nothing is helping.