Today I happened to observe a truly rare phenomenon. In the morning, a cooler stopped on the leased server. I didn’t notice that the server had been monstrously slowing down the output of web pages and had been interrupting connections via RDP.
I plugged in to KVM and see: the system of remote monitoring equipment tells me Critical Attention!

Namely, about problems with coolers:

But! The server continued to work ... He ochchchchen tried to do everything right, but he did not work well. This was especially apparent on the output of JPEG files. I never thought that I could personally see the “curvature of bytes” :)
')
Original:

As issued overheated server:

Original:

As issued overheated server:

Or another:

As issued overheated server:

I suppose that the server itself remained operational only thanks to the good cooling of the data center in which it stands :-)