But only on a soft restart. If I cold boot, it does not click. https://soundcloud.com/joshua-brown-330/clicking-computer-only-when-i At first I thought it was a fan, but why would a fan make noise only when soft-restarting? Of course it wouldn't. Someone suggested perhaps it's my drive dying. Said it was the "unmistakable" sound of HDD failure. But I have an SSD. I have two external USB mechanical drives but they are not the source of the clicking. The only thing I can think of is that perhaps it is the PSU? It's really the only other thing in the PC with moving parts, aside from the AIO liquid cooler.