Question PC froze with mouse and keyboard being completely turned off.

Jan 13, 2021
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Hello everyone.
As the title implies, I was playing league of legends with a bunch of my friends when suddenly my pc froze with no audio what so ever , my mouse & keyboard & headset were also deactivated. I was at an impasse as not even pressing the start button wouldn't close the pc so I had to shut it down by force.
As of now this problem hasn't reoccurred but it's quite concerning since this happened to me for the first time.
my pc specs :
Asus Z270P
GTX 1660S
I5-6400
RAM 2X4GB 2400mhz
PSU corsair 550W gold.