You might be thinking about the "Colossus: series of books by D.F. Jones.I recall a story written by Arthur C. Clarke in which he told the tale of our efforts to build supercomputers and an "internet" which linked all computers together. What happened was the computers "awakening" as a unified conscious. We had created a neural net...a massive brain.
...and then the lights went out on humankind.
If they aren't thinking about, I am.I can imagine the Admins thoughts....
"Unreal tournament at my place tonight!!"