the memory multiplier is determining the speed of your RAM by taking the FSB speed you designate, and multiplying. for example say you are running an E8400 which has a multiplier of 9, and you want to achieve 3.6 ghz, you should set the frontside bus to 400 for 3600, and keep the memory settings stock (the 400 from DDR2 is memory running at 800) sometimes you can set a DRAM:FSB ratio to have more control over the overclock. for now, being new to overclocking i would focus solely on the CPU and save the memory for when you have a little more confidence in what you are doing. good luck

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