Computer Science · Computer Organization
A 256 Mb DRAM is organized as a 32M × 8 memory externally and as a 16K × 16K square array internally. Each row must be refreshed at least once every 50 milliseconds to forestall loss of data; refreshing one row takes 100 nanoseconds. What fraction of the total memory bandwidth is lost to refresh cycles?
- 14.3%
- 29.9%
- 33.3%✓
- 46.6%
Correct answer
3.3%
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