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Does dual channel memory double system bus speed???

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i have a 2.6ghz p4 with a fsb of 533 mhz which runs at 133mhz with a ddr 1 gb 400mhz on a single channel memory. Now if i plugin a diccto card for using dual channel memory will the system bus running at 133mhz double to 266mhz as data bandwidth has expanded.

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a b } Memory

The difference single and dual channel memory makes to the speed of the computer is less than 5% more like 2-3% depending on configuration.
a b } Memory

The system buss speed remins the same. All dual channel does is give the ram an additional access path, effectively doubling the speed of the ram access.
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thanks a lot for your replies. Appreciated.
I am also curious to know that can i put a dual core lga775 processors in a motherboard which accepts p4 lga775 processors. I have a intel d915glvg mobo (quite old now). Also even if i can put a dual core in it will the performance be poor as i can put only a ddr1 400 mhz ram.

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