Have you tried without the Revo drives plugged in?
It's a very heavy setup you have there. To debug this you are going to have to start pulling some of those drives I think. Will also need to know exactly what port which drive is connected to and which of those is your boot drive together with the SATA settings used.
Also is the system at stock or overclocked?
Finally, what UEFI version are you using?
-Raja