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Consider a DRAM memory chip organized as 2048 x 2048 array of bits. Assume that each row must be refreshed every 4 msec and that

Consider a DRAM memory chip organized as 2048 x 2048 array of bits. Assume that each row must be refreshed every 4 msec and that each refresh requires 50 nsec. What percentage of time is spent on refresh?

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