[SOLVED] My PC restarts randomly while playing games

Feb 15, 2020
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Hi all
Since a few days ago, my computer restarts randomly when I'm playing. After that, when I launch the game again, FPS are significantly lower than before the restart. I tried to take it to a computer store in order to repair it, but the manager couldn't figure out the problem. May anyone help me? I think it could be a CPU or motherboard issue. I have an i7-3770 and a Gigabyte GA-H77M-D3H, which are both 7 years old.