latency match with new memory

first please forgive me if this has been discussed often... I'm out of town with very limited internet access and do need an answer to this question.

I currently have some OCZ dual channel memory in my machine. I've come across a different brand at a good price. both are PC6400. I'm vaguely familiar with the latency numbers, but if I'm not overclocking or pushing the system, does it matter if the new memory is 4-4-4-12 and the other is something else (don't have figures with me....)

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  1. No, it doesn't matter. HOWEVER, the faster-rated RAM (ie--4-4-4-12) will HAVE to slow down to match the slower RAM (ie--5-5-5-15).

    So, you can mix and match, but you'll run everything at the slower speed. Not a major problem, BUT it means DON'T go spending alot of money on faster'll be a waste because it'll just default to match the slower stuff anyways.
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