Can a 800Mhz memory stick be used in a 400Mhz slot?
I have a 3 years old ThinkCentre (A52, type 8381). It has 1GB of RAM in 4 256MB sticks. According to the model spec, it supports 400Mhz DDR2 memory. I would like to increase the amount of RAM I have, given how cheap 1-2GB sticks are today. However, someone told me faster memory sticks (say 800Mhz) cannot be used when only 400Mhz are supported. This is a bummer, because for some reason 1GB of 400Mhz DDR2 costs about 3-4 times more than a modern DDR2 stick with the same size. Is this really the case? Can't a memory stick work in a frequency lower than its optimal?
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