I have switched to a Phenom 9750 (undervolted to 1,1 Volt with 2,4 GHz) and I don't have a problem anymore. Video quality is improved
only because of this 1080i issue I switched also to a Phenom (smallest X3). I also made the mistake buying a X2 BE-2400. I had long discussions with other members of this forum before who spoke about 1080p all the time, not admitting that 1080i is MUCH more difficult for the system. Just like a lot picture quality tests on the internet.
But I don´t see the necessity to undervolt at all! Cool&Quiet enabled it happens from itself (Vista "balanced" power settings) -> CPU goes down to 1,0 GHz, vCore about 1,05-1,1 V.
Hungary