Ok so this is the issue. I've always used istat menus to monitor my computer usage i.e. RAM, CPU, Fans, power, etc. With my old 2008 Mac Pro istat used to display how much power it was using however with my 2009 Mac Pro it doesn't. It displays 0 Watts throughout. Any ideas on how to solve this. I'm really curious with regard to how much power this system uses.