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Please help me understand the following,

Only one transistor (1T) is enough to build a dynamic memory cell. Hence, DRAMs have higher densities and tend to be less expensive.

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In this context, "have higher densities" mean that the same number of transistors (or the same amount of die space) can store more bits.

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Basically, more memory per area - it's an analog to the dictionary meaning of "density" as it pertains to physics. –  Shinrai Oct 3 '11 at 17:56
    
"Higher density" actually means that more transistors can be packed into the same space, not that there are more bits stored per transformer (in general). –  CarlF Oct 3 '11 at 19:29
    
@CarlF: Not in this context. If you read the original quote, that meaning of "density" makes the quote senseless. (What does how many transistors are needed to build a cell have to do with how many transistors can be packed into the same space?) –  David Schwartz Oct 3 '11 at 19:51

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