Hi, Even before I upgraded my mac pro the machine randomly freezed. Especially when running FCP. After the cpu upgrade and gtx670 I have this freezes a lot more. I tried to type this message two times and before I could finish the mac totally stopped. No mouse or keyboard action. I even had a total shut down yesterday. As far as I can see everything works fine. CPU is around 30 degrees celsius. What could be the problem? I'm doing a rember test now to see if the ram is failing. I do have a intensity pro card and a wacom tablet attached to the machine.