I've got the latest bios, and the CPU is bone stock. It worked just fine for half a year, and now suddenly it crashes now and then. I've ran Prime95 and IntelBurnTest 24 hours each with absolutely 0 stability issues.
I did notice... I'm using a VST plugin on my capturecard, and when the capturecard's HDMI loses signal (HDMI switch for example) then the VST plugin crashes and takes OBS down with it.