I have a Nvidia 8800 GT 512mb alpha dog edition and i bought a Thermaltake DuOrb cooler. With the stock cooling everything is fine but when i put the new cooler on the screen goes black for about 30sec and then shuts down the monitor but the pc remains running and i can hear windows is loading but nothing is showing. I have a hunch that its a power problem but im not sure. Any help will be appreciated.