So, this is about as intense as it gets. 4x Titans, each equipped with a VRM ripped from an ASUS HD 7970 card. There are a couple of things I am not understanding though, such as how they got 4x Titans to work when NVIDIA only supports 3x. But given the frankenstein they created here, it's probably best to not ask questions.
http://kingpincooling.com/forum/showthread.php?t=2229
http://kingpincooling.com/forum/showthread.php?t=2229