You need a DDR2 or DDR3 memory with a motherboard which supports 45nm CPUs (Q9450 is a 45nm CPU), SOME P965 boards (like some of ASUS
P965 boards support it ) and ALL P35 boards and ALL X38 boards will support it
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XPS M1730,IntelCore2Duo T9300@2.5GHZ,2x8800MGTX in SLI,4GB DDR2 667 RAM,DUAL 250GB 7200 RPM,VISTA HP with SP1,17" with 1920x1200 resolution
well, X48 isn't out yet, but yeah P35/DDR2 is a perfect combination
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XPS M1730,IntelCore2Duo T9300@2.5GHZ,2x8800MGTX in SLI,4GB DDR2 667 RAM,DUAL 250GB 7200 RPM,VISTA HP with SP1,17" with 1920x1200 resolution