No worries ! It's Murphy's Law in action, "anything that can go wrong will go wrong in the worst possible way ". It's just a bump in the road, nothing more.I wouldn't believe it myself, If this hadn't happened to me either.
I was standing a long time in front of my PC slack-jawed.
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Never thought this could even be possible.
Why doesn't modern motherboard's have no fuse/protection circuit for this? (It was a 2 year old "Asus Z170 Pro Gaming")