Computer crashes to red screen when gaming! HELP

So like the title says, my computer has been crashing ever since I upgraded my CPU cooler from the stock one that came with my AMD FX 8350 to the CM Hyper 212. It only does it when I'm playing Overwatch, but it has crashed and frozen up when I'm just watching YouTube videos too. It only crashes to a red screen when I'm playing Overwatch, I've had 3 or 4 hour sessions on other games like Rocket League and H1Z1 and haven't experienced this issue. I have reinstalled the CPU cooler to make sure it wasn't the thermal paste and have been monitoring the CPU temperature which hasn't been any hotter than normal. It was happening more frequently until I put an FPS cap on Overwatch, but it will still do it every once in a while. I'll be playing and all of a sudden it freezes up and crashes to a red screen with a loud buzzing sound. I checked the event log in windows and I see the critical error as "Kernel-Power."

Here is my rig: PCPartPicker part list / Price breakdown by merchant

My feeling is that it is my PSU but I wanted to get some input from some more people who are more knowledgeable than I am. Please help, this is really starting to annoy me and I'm worried it could damage my hardware.

Thanks!