This is a recent issue, starting maybe a month ago. It started with path of exile. I was playing normally at first, then out of the blue my monitor shuts down, saying the vga signal is lost. Thing is, my pc was still running, I'd even hear the audio normally. Just my monitor shut down. My only option was to hard reset my pc. Started playing again, happened again maybe 10 minutes later. Since then I've been playing terraria all day. Not a single issue even in full screen. Then just this morning I run kenshi, play fine for maybe 2 hours, then boom the same thing happens. This time my computer got VERY loud though. I'm thinking my gpu is dying, but I'll take any input.