You could very well be right since its x38 and all of us with q9650 or the extreme version used p45 ud3p motherboards to achieve great clocks. But honestly you really should go to p 45 if your having trouble with 425 fsb or greater . My qx9650 which I sold for its full retail cost because of what it could do, used ud3p mobo and could do 530 fsb with low termination and low volts ran very cool maybe you should consider it.