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What's the deal with FSB, quadpump, DDR?

watdahel

watdahel

Golden Member
So let me get this straight - the latest Intel boards run at 266 MHz FSB at default, which are quad-pumped for an effective 1064 MHz? Now, in order to fully take advantage of DDR2 800 you have to set FSB to 400 MHz? So, the FSB is 1600 MHz due to quadpumping?

How come some motherboards say they support DDR2 800 and yet can only do 333 MHz FSB?
 
They run the memory and the FSB asynchronously. The memory is configured to run at a particular ratio relative to the FSB.
 
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