Souped-up memory

What is the peak transfer rate of DDR2 memory that has a memory clock rate of 200 MHz?

A) 2400 MB/s

B) 3200 MB/s

C) 6400 MB/s

D) 12800 MB/s

E) I was told there would be no math

The answer: C) 6400 MB/s

The calculation of DDR2 transfer rates is the clock rate x 2 (bus clock multiplier) x 2 (dual-rate) x 64 (number of bits transferred per cycle) / 8 (bits per byte). If the DDR2 memory clock rate is 200 MHz, the total throughput would be 6400 MB/s.

Want to know more? Watch “Identifying Memory Types.”

Memory comes in many shapes and sizes. In this video, you’ll learn about RAM, ROM, static RAM, dynamic RAM, synchronous DRAM, and how to calculate the throughput rates of DDR memory.