Help. I'm on my second build (my first was 3 years ago without problems) and I now have a problem. I have a BeQuiet PS, a Gigabyte G1 Sniper M/B and 3570K processor. When I switch on the Zigmatek cooler and system fans spin for a second then the system shuts down, then restarts, and continues on off until I kill power. The M/B doesn't beep or show any signs of life. What do I need to look at?