1409
No common rube
(i.ibb.co)
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I think the idea is that average people have no clue what color they are. So they'd be forced to take it out to check and thus have to restart their PC. It's a trick!
Altho, maybe I'm misunderstanding something because all the pins of all the electrical cords I've ever seen have been silver?
I've seen brass colored on some older plugs.
Meanwhile I don't have any clue as I only disable my PSU with a switch.