dx8976,

probably hindi naman gaanong noticeable yung performance difference... you certainly can't beat the performance of the AthlonXP for its price. probably a matter of seconds or minutes (im not too sure on that though)

regarding the memory, yup. ganyan ang setup ng nForce2, intel i865 and i875 motherboards, dual-channel kasi ang memory design niya. if you use only one mem stick, single-channel lang yung takbo niya, which gives half the bandwidth and lower performance.

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